By extracting a new `filter_items` method, we can override that in the
IssuesFinder and MergeRequestsFinder separately, so we don't need checks that
the model is the correct one, because we can just use the class we're in to know
that.

We can do the same for the VALID_PARAMS constant, by making it a class method.

Move spinach project network graph tests to RSpec

See merge request gitlab-org/gitlab-ce!17171

Remove unecessary validate: true from belongs_to :project

See merge request gitlab-org/gitlab-ce!17166

Remove graphs_show.js webpack bundle

See merge request gitlab-org/gitlab-ce!17194

This does not seem to serve any clear purpose and causes other issues (see https://gitlab.com/gitlab-org/gitlab-ce/issues/43196#note_59275652)

Remove extraneous tests from Issues API spec

Closes #25201

See merge request gitlab-org/gitlab-ce!17222

Update two links in the changelog developer docs

See merge request gitlab-org/gitlab-ce!17220

Chart.html.haml refactor

See merge request gitlab-org/gitlab-ce!16897

These were all testing an implementation detail of
`Issues::UpdateService` which is already well-tested and doesn't need to
be re-tested here.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/25201

[GH Import] Create an empty wiki if wiki import failed

Closes #43020

See merge request gitlab-org/gitlab-ce!17112

Resolve "group request membership mail with too long list of "To:""

Closes #42274

See merge request gitlab-org/gitlab-ce!17121

Fix single digit value clipping for stacked progress bar

Closes gitlab-ee#4864

See merge request gitlab-org/gitlab-ce!17217

Avoid slow File Lock checks when not used

Closes #43339

See merge request gitlab-org/gitlab-ce!17140

Increase feature flag cache TTL to one hour

Closes #40854

See merge request gitlab-org/gitlab-ce!17213

Fix and simplify end-to-end tests for secret variables

Closes gitlab-qa#190

See merge request gitlab-org/gitlab-ce!17173

Flipper already takes care of flushing cache entries when
enabling/disabling features so it should be safe to increase the TTL.
This in turn should drastically reduce the number of Flipper queries
executed.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/40854

Resolve "Double closing system  notes when closing issue with Merge Request"

Closes #32546 and #32564

See merge request gitlab-org/gitlab-ce!17035

Don't attempt to update user tracked fields if database is in read-only

Closes gitlab-ee#4972

See merge request gitlab-org/gitlab-ce!17200

The tracking issue if this causes problems is
https://gitlab.com/gitlab-org/gitaly/issues/1028

Docs: Update all articles with the new layout (metadata from the frontmatter)

Closes #42831

See merge request gitlab-org/gitlab-ce!17187

Fix squash rebase not working when diff contained encoded data

Closes gitlab-ee#4960

See merge request gitlab-org/gitlab-ce!17205

[ci skip]

Also avoid double commit lookup during file lock check by reusing
memoized commits.

Backport webpack.config.js changes from EE

See merge request gitlab-org/gitlab-ce!17185

Fix Error 500 when viewing a commit with a GPG signature in Geo

Closes gitlab-ee#4825

See merge request gitlab-org/gitlab-ce!17207

Remember assignee when moving an issue

See merge request gitlab-org/gitlab-ce!17116

Sanitize extra blank spaces used when uploading a SSH key

Closes #40552

See merge request gitlab-org/gitlab-ce!17138

Closes gitlab-org/gitlab-ee#4825

When the applied diff contains UTF-8 or some other encoded data, the diff
returned back from the git process may be in ASCII-8BIT format. Writing this
data to stdin may fail if the data because stdin expects this data to be in
UTF-8. By switching the output to binmode, we ensure that the diff will
always be written as-is.

Closes gitlab-org/gitlab-ee#4960

Related to #41949

With Geo, attempting to view an endpoint with a user could result in an
Error 500 since Devise attempts to update the last sign-in IP and other
details.

Closes gitlab-org/gitlab-ee#4972