Fix conflict resolution from corrupted upstream

Closes gitlab-ee#2128

See merge request !11298

New branch new mr docs

See merge request !11308

I don't know why this happens exactly, but given an upstream and fork repository
from a customer, both of which required GC, resolving conflicts would corrupt
the fork so badly that it couldn't be cloned.

This isn't a perfect fix for that case, because the MR may still need to be
merged manually, but it does ensure that the repository is at least usable.

My best guess is that when we generate the index for the conflict
resolution (which we previously did in the target project), we obtain a
reference to an OID that doesn't exist in the source, even though we already
fetch the refs from the target into the source.

Explicitly setting the source project as the place to get the merge index from
seems to prevent repository corruption in this way.

Usage ping updates

Closes #31741 and #31453

See merge request !11231

Improve project list cache key

Closes #31863

See merge request !11325

Autolink package names in Gemfile

See merge request !11224

Paste a copied MR source branch name as code when pasted into a GFM form

See merge request !11315

Removed all instances of Object.assign by using es6 classes, also includes some …

See merge request !11288

Expose memory deltas between app deployments and refactor prometheus queries to support more custom queries

See merge request !10981

Only rename namespaces and projects with an invalid path

See merge request !11338

# Conflicts:
#   app/assets/javascripts/vue_merge_request_widget/components/mr_widget_header.js

Consistently use monospace font for commit SHAs and branch and tag names

See merge request !11276

Fix form_spec.rb

See merge request !11330

For exact matches, not namespaces that end with an invalid path

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fix milestone_filter_spec.rb

See merge request !11329

Merge branch '31384-new-issue-button-on-no-results-page-after-search-doesn-t-go-to-correct-form' into 'master'

Remove 'New Issue' button from 'There are no issues to show' state graphic

Closes #31384

See merge request !11263

Fix failing backup filename spec for RCs

See merge request !11318

Adds pipeline id to 'Last Pipeline' link in pipeline schedules

Closes #32103

See merge request !11258

Rework update_assignee_cache_counts

Closes #31873

See merge request !11270

MRWidget: Fix target branch link.

See merge request !11267

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Enabled 'no one' as a merge access level in protected branches

Closes #31541

See merge request !11232

Add "SHA mismatch" state to the MR widget

Closes #32178

See merge request !11316

Backport FileFinder from EE

Closes #32188

See merge request !11319

Uniform CI status components in vue

Closes #30286

See merge request !11235