Refactor codebase to use the `useUIValue` hook.

[ankitrox]

Feature Description

In #12711, we have added useUIValue hook. Throughout the codebase, we can replace:

select( CORE_UI ).getValue() with useUIValue and
dispatch( CORE_UI ).setValue() with setValue returned by hook.

As per the AC for #12711, we should address this refactor in multiple sub-issues so we don't end up with a single, massive PR.

---

Do not alter or remove anything below. The following sections will be managed by moderators only.

Acceptance criteria

Implementation Brief

Test Coverage

QA Brief

Changelog entry