Disable default export rules

This is part of the work to implement the consensus reached in the
[RFC][1] to prefer named exports over defalt exports.

Future iterations will migrate existing default exports to named
exports.

The bulk of the changes in this commit were performed with the following
script:

```bash
set -u

changed-files()
{
    local trunk="origin/master"
    local file=
    local committed_files=$(git diff "$trunk"... --numstat \
        | awk '/\.(js|vue)$/{ print $3 }')
    local changed_files=$(git diff --numstat \
        | awk '/\.(js|vue)$/{ print $3 }')
    for file in ${committed_files[@]} ${changed_files[@]}; do
        if [ -f "$file" ]; then
            echo "$file"
        fi
    done
}

git grep -lz "import/prefer-default-export" -- '**/*.js' \
    | xargs -0 perl -0pi -e \
    "s/[^\n]*eslint-disable[^\n]*"\
"import\/prefer-default-export[^\n]*\n//mgs"

git grep -lz "rfcs/-/issues/20" -- '**/*.js' \
    | xargs -0 perl -0pi -e \
    "s/[^\n]*rfcs\/-\/issues\/20[^\n]*\n//mgs"

yarn prettier --write $(changed-files)
```

The script is [idempotent][2], to help make it easier to keep
up-to-date.

[1]: https://gitlab.com/gitlab-org/frontend/rfcs/-/issues/20
[2]: https://en.wikipedia.org/wiki/Idempotence

app/assets/javascripts/pages/constants.js

-/* eslint-disable import/prefer-default-export  */
-
 export const FILTERED_SEARCH = {
   MERGE_REQUESTS: 'merge_requests',
   ISSUES: 'issues',

app/assets/javascripts/pages/projects/constants.js

-/* eslint-disable import/prefer-default-export  */
-
 export const ISSUABLE_INDEX = {
   MERGE_REQUEST: 'merge_request_',
   ISSUE: 'issue_',

app/assets/javascripts/pipelines/utils.js

 import { pickBy } from 'lodash';
 import { SUPPORTED_FILTER_PARAMETERS } from './constants';
-// eslint-disable-next-line import/prefer-default-export
 export const validateParams = params => {
   return pickBy(params, (val, key) => SUPPORTED_FILTER_PARAMETERS.includes(key) && val);
 };

app/assets/javascripts/registry/explorer/stores/index.js

@@ -7,7 +7,6 @@ import state from './state';
 Vue.use(Vuex);
-// eslint-disable-next-line import/prefer-default-export
 export const createStore = () =>
   new Vuex.Store({
     state,

app/assets/javascripts/registry/explorer/utils.js

-// eslint-disable-next-line import/prefer-default-export
 export const decodeAndParse = param => JSON.parse(window.atob(param));

app/assets/javascripts/reports/store/getters.js

 import { LOADING, ERROR, SUCCESS, STATUS_FAILED } from '../constants';
-// eslint-disable-next-line import/prefer-default-export
 export const summaryStatus = state => {
   if (state.isLoading) {
     return LOADING;

app/assets/javascripts/repository/utils/commit.js

-// eslint-disable-next-line import/prefer-default-export
 export function normalizeData(data, path, extra = () => {}) {
   return data.map(d => ({
     sha: d.commit.id,

app/assets/javascripts/repository/utils/icon.js

@@ -88,7 +88,6 @@ const fileTypeIcons = [
   },
 ];
-// eslint-disable-next-line import/prefer-default-export
 export const getIconName = (type, path) => {
   if (entryTypeIcons[type]) return entryTypeIcons[type];

app/assets/javascripts/repository/utils/readme.js

@@ -28,5 +28,4 @@ const isPlainReadme = file => {
   return re.test(file.name);
 };
-// eslint-disable-next-line import/prefer-default-export
 export const readmeFile = blobs => blobs.find(isRichReadme) || blobs.find(isPlainReadme);

app/assets/javascripts/snippets/mixins/snippets.js

@@ -2,7 +2,6 @@ import GetSnippetQuery from '../queries/snippet.query.graphql';
 const blobsDefault = [];
-// eslint-disable-next-line import/prefer-default-export
 export const getSnippetMixin = {
   apollo: {
     snippet: {

app/assets/javascripts/static_site_editor/services/image_service.js

-// eslint-disable-next-line import/prefer-default-export
 export const getBinary = file => {
   return new Promise((resolve, reject) => {
     const reader = new FileReader();

app/assets/javascripts/vue_merge_request_widget/stores/artifacts_list/getters.js

 import { s__, n__ } from '~/locale';
-// eslint-disable-next-line import/prefer-default-export
 export const title = state => {
   if (state.isLoading) {
     return s__('BuildArtifacts|Loading artifacts');

app/assets/javascripts/vue_shared/components/filtered_search_bar/filtered_search_utils.js

-// eslint-disable-next-line import/prefer-default-export
 export const stripQuotes = value => {
   return value.includes(' ') ? value.slice(1, -1) : value;
 };

app/assets/javascripts/vue_shared/components/lib/utils/diff_utils.js

-/* eslint-disable import/prefer-default-export */
-
 function trimFirstCharOfLineContent(text) {
   if (!text) {
     return text;

app/assets/javascripts/vuex_shared/bindings.js

@@ -9,7 +9,6 @@
  * @param {string} root - the key of the state where to search fo they keys described in list
  * @returns {Object} a dictionary with all the computed properties generated
  */
-// eslint-disable-next-line import/prefer-default-export
 export const mapComputed = (list, defaultUpdateFn, root) => {
   const result = {};
   list.forEach(item => {

doc/development/fe_guide/vuex.md

@@ -55,10 +55,6 @@ export const createStore = () =>
   });
 ```
-_Note:_ Until this
-[RFC](https://gitlab.com/gitlab-org/frontend/rfcs/-/issues/20) is implemented,
-the above will need to disable the `import/prefer-default-export` ESLint rule.
-
 ### `state.js`
 The first thing you should do before writing any code is to design the state.

ee/app/assets/javascripts/analytics/cycle_analytics/store/modules/custom_stages/getters.js

-// eslint-disable-next-line import/prefer-default-export
 export const customStageFormActive = ({ isCreatingCustomStage, isEditingCustomStage }) =>
   Boolean(isCreatingCustomStage || isEditingCustomStage);

ee/app/assets/javascripts/analytics/merge_request_analytics/utils.js

@@ -18,7 +18,6 @@ import { dateFormats } from '../shared/constants';
  *
  * @return {Array} the computed month data
  */
-// eslint-disable-next-line import/prefer-default-export
 export const computeMonthRangeData = (startDate, endDate, format = dateFormats.isoDate) => {
   const monthData = [];
   const monthNames = getMonthNames(true);

ee/app/assets/javascripts/analytics/productivity_analytics/store/actions.js

 import SET_ENDPOINT from './mutation_types';
-// eslint-disable-next-line import/prefer-default-export
 export const setEndpoint = ({ commit }, endpoint) => commit(SET_ENDPOINT, endpoint);

ee/app/assets/javascripts/analytics/productivity_analytics/store/getters.js

-// eslint-disable-next-line import/prefer-default-export
 export const getMetricTypes = state => chartKey =>
   state.metricTypes.filter(m => m.charts.indexOf(chartKey) !== -1);