Feature switch layer around Approvable and VisibleApprovable

See merge request gitlab-org/gitlab-ee!9147

Adds new and edit modules FF store

See merge request gitlab-org/gitlab-ee!9292

Fix `star` action in the `explore` subpages

See merge request gitlab-org/gitlab-ce!24693

[Part 3] Add support for start and due dates in Epic sidebar

See merge request gitlab-org/gitlab-ee!9304

To eager load rules, reuse the association without scope.
Filter those rules using `regular?` method.

as it is no longer needed.

Apply project scope

It is now wished for the feature to be disabled by default.
Since we can't control when the background migration finishes,
which would set the old flag to true,
changing the flag is easier to work around with.

From dev.gitlab repo

DRY maintainer

The logics are copied over but unchanged.

Similar to MergeRequestPresenter

Logic unchanged

Only call ApprovalState when enabled

Add query method for id

See merge request gitlab-org/gitlab-ce!24386

Standardize token value capitalization in filter bar

Closes #54213

See merge request gitlab-org/gitlab-ce!23846

Adds start and due date pickers within sidebar.
Supports for expand and collapsed sidebar states.

Fix create_edit_delete_epic_spec.rb test flakiness

Closes gitlab-org/quality/nightly#63

See merge request gitlab-org/gitlab-ee!9300

Auto DevOps QA: increase IP address timeout, remove quarantine

Closes gitlab-qa#369

See merge request gitlab-org/gitlab-ce!24687

[EE] Refactor Hashed Storage for future Rollback functionality

See merge request gitlab-org/gitlab-ee!9175

Refactor Hashed Storage for future Rollback functionality

See merge request gitlab-org/gitlab-ce!24402

Quarantine failing test rebase_merge_request_spec.rb

See merge request gitlab-org/gitlab-ce!24682

Migrate jobs from `storage_migrator` to
`hashed_storage:hashed_storage_migrator`.

We need this new state for the Geo event logic in EE

Specs were reviewed and improved to better cover the current behavior.
There was some standardization done as well to facilitate the
implementation of the rollback functionality.

StorageMigratorWorker was extracted to HashedStorage namespace were
RollbackerWorker will live one as well.

This will serve as new base class for both Migrate and Rollback

This is part of the refactor to include a RollbackService into
HashedStorage module