Don't convert issuable_initial_data into JSON

See merge request gitlab-org/gitlab-ce!17318

Fix Group labels load failure when there are duplicate labels present

Closes #43598

See merge request gitlab-org/gitlab-ce!17353

Respond with more appropriate HTTP status code when repo does not exist

See merge request gitlab-org/gitlab-ce!17341

Restart Unicorn and Sidekiq when GRPC throws 14:Endpoint read failed

Closes gitaly#1036

See merge request gitlab-org/gitlab-ce!17293

Instead of converting hash into JSON inside
issuable_initial_data method, return hash and convert
to JSON later. This allows us to easily extend basic
issuable data with resource specific values. For example
for Epic these data should include also labels, so we can then
do something like:
issuable_initial_data(@epic).merge(labels: @epic.labels).to_json

[ci skip]

QA BACKPORT - Test merge request rebase

See merge request gitlab-org/gitlab-ce!17186

Minimal fix for artifacts service

Closes #43022

See merge request gitlab-org/gitlab-ce!17313

Move RecentSearchesDropdownContent vue component

See merge request gitlab-org/gitlab-ce!16951

Merge branch '43570-localstorage-clear-error-when-feature-test-fails-before-visiting-page' into 'master'

Resolve "localStorage.clear() error when Capybara test fails before visiting page"

Closes #43570

See merge request gitlab-org/gitlab-ce!17339

Fix deletion attempts on dropped tables in specs

Closes #42897

See merge request gitlab-org/gitlab-ce!17340

Refactored use of boards/boards_bundle.js and created a dispatcher import

See merge request gitlab-org/gitlab-ce!17145

# Conflicts:
#   config/webpack.config.js

Refactored webpack bundle tag for deploy keys

See merge request gitlab-org/gitlab-ce!17324

Reduce webpack merge conflicts

See merge request gitlab-org/gitlab-ce!17328

Remove issue_show webpack bundle

See merge request gitlab-org/gitlab-ce!17326

move webpack bundles we intend to keep below the list of bundles we're refactoring to reduce conflicts

Backport custom metrics ce components

See merge request gitlab-org/gitlab-ce!17300

This reverts commit 34e16110.

Resolve "Domain validation for Pages custom domains" (master branch)

Closes #29497, #42971, and #42083

See merge request gitlab-org/gitlab-ce!17311

This reverts commit 28c6a6b0.

Add a button to deploy a runner to a Kubernetes cluster in the settings page

Closes #42044

See merge request gitlab-org/gitlab-ce!17278

Add missing empty line at the end of file

See merge request gitlab-org/gitlab-ce!17303

Convert switch into if statement

See merge request gitlab-org/gitlab-ce!17304

# Conflicts:
#   db/schema.rb