Use a memoized Flipper engine in specs to simplify testing

See merge request gitlab-org/gitlab!33054

Web IDE: Remove redundant getter `hasChanges`

Closes #196630

See merge request gitlab-org/gitlab!32990

Update redirected links

See merge request gitlab-org/gitlab!33356

Add invalid field to SnippetInputAction specs

See merge request gitlab-org/gitlab!33392

Move jquery.waitforimages import away from main

See merge request gitlab-org/gitlab!33269

Include in docs how to trigger an immediate pull

See merge request gitlab-org/gitlab!32567

Update of Gitaly gem

See merge request gitlab-org/gitlab!33378

Docs: Adding link to project milestones api for clarification

See merge request gitlab-org/gitlab!33325

Docs: Adding link to group milestones api for clarification

See merge request gitlab-org/gitlab!33323

There is already a getter `someUncommitedChanges` that does the same
job, so replace it with that.

Also turns out that `repo_tabs.vue` doesn't really use the properties
`hasChanges` and `mergeRequestId` it takes in, so that resulted in a lot
of dead code removal.

Ensure json.extra.sidekiq conforms to logging schema

See merge request gitlab-org/gitlab!32988

Docs: more spelling fixes

See merge request gitlab-org/gitlab!33354

Fix spelling, or change to accepted usage.

Fix feature flag name for Service Desk

See merge request gitlab-org/gitlab!33385

Add update validations to SnippetInputAction

See merge request gitlab-org/gitlab!33379

Onboarding experiment new project step

See merge request gitlab-org/gitlab!32145

Fix Kubernetes applications template issues

See merge request gitlab-org/gitlab!33266

Fix bug in snippets updating only file_name or content

See merge request gitlab-org/gitlab!33375

Add and use clusters with_all_applications trait

See merge request gitlab-org/gitlab!33126

Add backup strategy link

See merge request gitlab-org/gitlab!33348

Add DS detection of build.gradle.kts

See merge request gitlab-org/gitlab!32727

This makes us to use a memoized Flipper engine
that simply always works.

We also change a implementation of `persisted_names`
to use a `Flipper` instead of requesting features
manually.

By default a memoized engine is used, which
can be overwritten with `stub_feature_flags: false`.

The memoized engine requires us to use object that
are `FeatureGate-inherited`. We ensure
that this holds true, always.

This MR also updates all tests to adhere to this requirement.

[ci skip]

[ci skip]

Add polling for vulnerability comments and state

See merge request gitlab-org/gitlab!30420

Remove search icon from Project find file button

Closes #25830

See merge request gitlab-org/gitlab!33198

Persist resolution alert dismissal

See merge request gitlab-org/gitlab!31739

As the new version of Gitaly server is used
we can update current version of gem to get
support of the new features and fields exposed
by the new version of the server.

Bump cluster-applications to 0.17.0

See merge request gitlab-org/gitlab!32931

Added producing of new emoji map which will be loaded async in the future

See merge request gitlab-org/gitlab!33292