Add latest changes from gitlab-org/gitlab@12-7-stable-ee

changelogs/unreleased/add-group-id-column.yml

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-title: Save Instance Administrators group ID in DB
-merge_request: 22600
-author:
-type: changed

changelogs/unreleased/add-warnings-to-sidekiq-rake-tasks.yml

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-title: Add deprecation warning to Rake tasks in sidekiq namespace
-merge_request:
-author:
-type: removed

changelogs/unreleased/add_comment_on_event_enabled_to_services_api.yml

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-title: Add comment_on_event_enabled to services API
-merge_request:
-author:
-type: added

changelogs/unreleased/ag-add-app-multi-logger.yml

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-title: Add structured logging for application logs
-merge_request: 22379
-author:
-type: other

changelogs/unreleased/ak-bubble-up-log-source.yml

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-title: Pass log source to the frontend
-merge_request: 22694
-author:
-type: changed

changelogs/unreleased/ak-logs-search-4.yml

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-title: Add full text search to pod logs
-merge_request: 21656
-author:
-type: added

changelogs/unreleased/alai-37360-sidebarBug.yml

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-title: Sidebar getting partially hidden behind the content block
-merge_request: 21978
-author: allenlai18
-type: fixed

changelogs/unreleased/allow-skip-ci-on-rebase.yml

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-title: Allow "skip_ci" flag to be passed to rebase operation
-merge_request: 22800
-author:
-type: added

changelogs/unreleased/ap-33785-file-integrity.yml

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-title: Ensure content matches extension on image uploads
-merge_request: 20697
-author:
-type: security

changelogs/unreleased/api_services_index_endpoint.yml

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-title: New API endpoint GET /projects/:id/services
-merge_request: 21330
-author:
-type: added

changelogs/unreleased/backward-compatibility-for-background-migrations.yml

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-title: Make BackgroundMigrationWorker backward compatible
-merge_request: 22271
-author:
-type: fixed

changelogs/unreleased/better-errors-from-extends.yml

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-title: Add JSON error context to extends error in CI lint
-merge_request: 30066
-author:
-type: changed

changelogs/unreleased/burndown-optimisations.yml

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-title: Performance improvements on milestone burndown chart
-merge_request: 22380
-author:
-type: performance

changelogs/unreleased/bvl-fix-mwps-api.yml

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-title: Merge a merge request immediately when passing merge when pipeline succeeds
-  to the merge API when the head pipeline already succeeded
-merge_request: 22777
-author:
-type: fixed

changelogs/unreleased/bvl-gitaly-dynamic-deadline.yml

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-title: Don't let Gitaly calls exceed a request time of 55 seconds
-merge_request: 21492
-author:
-type: performance

changelogs/unreleased/bw-board-sorting.yml

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-title: Project issue board names now sorted correctly in FOSS
-merge_request: 22807
-author:
-type: fixed

changelogs/unreleased/cache-ref-names-in-discussion-endpoint.yml

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-title: Reduce Gitaly calls needed for issue discussions
-merge_request:
-author:
-type: performance

changelogs/unreleased/cancel-merge-train-pipeline-when-dropped.yml

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-title: Cancel running pipelines when merge request is dropped from merge train
-merge_request: 22146
-author:
-type: fixed

changelogs/unreleased/ci-resource-group-doc.yml

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-title: Add 'resource_group' keyword to .gitlab-ci.yml for pipeline job concurrency
-  limitation
-merge_request: 21617
-author:
-type: added

changelogs/unreleased/ci-resource-group-model.yml

----
-title: Add Ci Resource Group models
-merge_request: 20950
-author:
-type: other