Use max of approvals_before_merge between project and MR at runtime

Closes #10909 and #10055

See merge request gitlab-org/gitlab-ee!10766

Previously, MR#approvals_before_merge is nil when it is <= project
(from `clamp_approvals_before_merge`).
This changed in f480d145,
which would always persist a min value.
This caused regression that updating MR would fail if project's
value is increased later on.

The relationship between value being nil and validation can be easily
overlooked.

Removing validation and taking the max of the two makes logic clearer.

Set correct timestamps when creating past issues

Closes #58361

See merge request gitlab-org/gitlab-ce!27406

`None` for assignees

Closes #60599

See merge request gitlab-org/gitlab-ce!27419

Update assignees_spec.js

Update sidebar_spec.rb

Update issues_spec.rb

Test using Git 2.21

See merge request gitlab-org/gitlab-ce!27418

Resolve "Karma failing with MrWidgetAlertMessage when helpPath is provided  Maximum call stack size exceeded"

Closes #60605

See merge request gitlab-org/gitlab-ce!27429

Update the Operations Dashboard docs

See merge request gitlab-org/gitlab-ee!11027

- Change image
- Change product tier
- Update the profile preferences docs

Docs: CI/CD intro - add new illustration + description

See merge request gitlab-org/gitlab-ce!27278

Link to resource label events API

See merge request gitlab-org/gitlab-ce!27412

Remove project_creation_level license check

See merge request gitlab-org/gitlab-ee!11069

This was removed in dec08f02 but
reintrodced in 980b8292 due to an
incorrectly resolved merge conflict.

Create frontend FAQ (documentation)

See merge request gitlab-org/gitlab-ce!26372

Replaced "View file" button with doc-text icon

Closes #59034

See merge request gitlab-org/gitlab-ce!27365

Return Vulnerabilities::Feedback created_at column

See merge request gitlab-org/gitlab-ee!11015

This will be used by the frontend to indicate how long ago an action was
taken

Update merge request widget to accommodate post-merge pipelines

See merge request gitlab-org/gitlab-ce!25983

Fix merge request pipeline warnings in EE

See merge request gitlab-org/gitlab-ee!10865

This commit adds two new warning messages to the MR widget that handle
cases involving merge request pipelines.

Fix minor typo in LDAP docs

Closes #60413

See merge request gitlab-org/gitlab-ce!27415

Fix styling for `app/assets/stylesheets/pages/status.scss`

Closes #59929

See merge request gitlab-org/gitlab-ce!26875

Hide overflow in scoped labels

Closes #48431

See merge request gitlab-org/gitlab-ce!27362