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/ide/stores/modules/pane/getters.js

-// eslint-disable-next-line import/prefer-default-export
 export const isAliveView = state => view =>
   state.keepAliveViews[view] || (state.isOpen && state.currentView === view);

app/assets/javascripts/ide/stores/modules/pipelines/constants.js

-// eslint-disable-next-line import/prefer-default-export
 export const states = {
   failed: 'failed',
 };

app/assets/javascripts/ide/stores/modules/pipelines/utils.js

-// eslint-disable-next-line import/prefer-default-export
 export const normalizeJob = job => ({
   id: job.id,
   name: job.name,

app/assets/javascripts/ide/stores/modules/router/actions.js

 import * as types from './mutation_types';
-// eslint-disable-next-line import/prefer-default-export
 export const push = ({ commit }, fullPath) => {
   commit(types.PUSH, fullPath);
 };

app/assets/javascripts/ide/stores/modules/router/mutation_types.js

-// eslint-disable-next-line import/prefer-default-export
 export const PUSH = 'PUSH';

app/assets/javascripts/ide/stores/modules/terminal/getters.js

-// eslint-disable-next-line import/prefer-default-export
 export const allCheck = state => {
   const checks = Object.values(state.checks);

app/assets/javascripts/ide/sync_router_and_store.js

-/* eslint-disable import/prefer-default-export */
 /**
  * This method adds listeners to the given router and store and syncs their state with eachother
  *

app/assets/javascripts/import_projects/utils.js

 import { STATUSES } from './constants';
 // Will be expanded in future
-// eslint-disable-next-line import/prefer-default-export
 export function isProjectImportable(project) {
   return project.importStatus === STATUSES.NONE && !project.importSource.incompatible;
 }

app/assets/javascripts/integrations/edit/store/actions.js

 import * as types from './mutation_types';
-// eslint-disable-next-line import/prefer-default-export
 export const setOverride = ({ commit }, override) => commit(types.SET_OVERRIDE, override);

app/assets/javascripts/integrations/edit/store/index.js

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

app/assets/javascripts/integrations/edit/store/mutation_types.js

-// eslint-disable-next-line import/prefer-default-export
 export const SET_OVERRIDE = 'SET_OVERRIDE';

app/assets/javascripts/issuables_list/service_desk_helper.js

@@ -3,7 +3,6 @@ import { __ } from '~/locale';
 /**
  * Returns the attributes used for gl-empty-state in the Service Desk issues list.
  */
-// eslint-disable-next-line import/prefer-default-export
 export function emptyStateHelper(emptyStateMeta) {
   const { isServiceDeskSupported, svgPath, serviceDeskHelpPage } = emptyStateMeta;

app/assets/javascripts/lib/utils/image_utility.js

-/* eslint-disable import/prefer-default-export */
-
 export function isImageLoaded(element) {
   return element.complete && element.naturalHeight !== 0;
 }

app/assets/javascripts/lib/utils/set.js

@@ -4,6 +4,5 @@
  * @param {Set} superset The set to be considered as the superset.
  * @returns {boolean}
  */
-// eslint-disable-next-line import/prefer-default-export
 export const isSubset = (subset, superset) =>
   Array.from(subset).every(value => superset.has(value));

app/assets/javascripts/lib/utils/type_utility.js

-// eslint-disable-next-line import/prefer-default-export
 export const isObject = obj => obj && obj.constructor === Object;

app/assets/javascripts/lib/utils/webpack.js

 import { joinPaths } from '~/lib/utils/url_utility';
 // tell webpack to load assets from origin so that web workers don't break
-// eslint-disable-next-line import/prefer-default-export
 export function resetServiceWorkersPublicPath() {
   // __webpack_public_path__ is a global variable that can be used to adjust
   // the webpack publicPath setting at runtime.

app/assets/javascripts/monitoring/csv_export.js

@@ -125,7 +125,6 @@ const csvData = (metricHeaders, metricValues) => {
  * @param {Object} graphData - Panel contents
  * @returns {String}
  */
-// eslint-disable-next-line import/prefer-default-export
 export const graphDataToCsv = graphData => {
   const delimiter = ',';
   const br = '\r\n';

app/assets/javascripts/monitoring/stores/embed_group/actions.js

 import * as types from './mutation_types';
-// eslint-disable-next-line import/prefer-default-export
 export const addModule = ({ commit }, data) => commit(types.ADD_MODULE, data);

app/assets/javascripts/monitoring/stores/embed_group/getters.js

-// eslint-disable-next-line import/prefer-default-export
 export const metricsWithData = (state, getters, rootState, rootGetters) =>
   state.modules.map(module => rootGetters[`${module}/metricsWithData`]().length);

app/assets/javascripts/monitoring/stores/embed_group/mutation_types.js

-// eslint-disable-next-line import/prefer-default-export
 export const ADD_MODULE = 'ADD_MODULE';