Replaces before blocks that manipulate db objects with let statements

Related to https://gitlab.com/gitlab-org/gitlab/-/issues/322817

Fix Epic bulk updates leaking to other epics

See merge request gitlab-org/gitlab!68730

Merge branch '336975-users-setup-for-company-field-is-overridden-to-true-for-existing-users-during-subscription' into 'master'

Resolve "Users "Setup for company" field is overridden to true for existing users during subscription purchase"

See merge request gitlab-org/gitlab!68868

Advanced Search: Create feature flags to disable some tabs

See merge request gitlab-org/gitlab!68640

Improve serialization of content editor extensions

See merge request gitlab-org/gitlab!68877

Remove subtransaction from DastSite

See merge request gitlab-org/gitlab!69077

Disallow editing environment name

See merge request gitlab-org/gitlab!68550

When environment gets updated, slug and tier aren't properly updated.

And we actually can't update slug as it's used by deployment
jobs(e.g. AutoDevOps) and should stay the same for the environment.

https://gitlab.com/gitlab-org/gitlab/-/issues/31268

Changelog: fixed

Fix use of Raven optional attributes

See merge request gitlab-org/gitlab!69116

Merge branch '320798-follow-up-from-update-feature-specs-to-reflect-new-project-members-view' into 'master'

Rename `Spec::Support::Helpers::Features::MembersHelpers` filename

See merge request gitlab-org/gitlab!69015

Remove refs to markdown_processing_examples in unit tests

See merge request gitlab-org/gitlab!68883

Vale sub fixes, refactors

See merge request gitlab-org/gitlab!68885

This fixes a usage of Raven optional attributes, which must be
provided under one of the acceptable, pre-defined keys.

Suggestion level test for unclear antecedents

See merge request gitlab-org/gitlab!67693

Added guidance for acronyms

See merge request gitlab-org/gitlab!68904

Split documentation redirects guide to its own page

See merge request gitlab-org/gitlab!69103

Add metadata to MR versions doc page

See merge request gitlab-org/gitlab!69089

Add dependency proxy to graphql

See merge request gitlab-org/gitlab!68605

Add a new route for storage purchase

See merge request gitlab-org/gitlab!68834

Add a simple page for it

Fix stuck bridge jobs when downstream project is invalid

See merge request gitlab-org/gitlab!68365

Prepare async indexes for ci table int8 swaps

See merge request gitlab-org/gitlab!68888

Fix visibility reference check

See merge request gitlab-org/gitlab!68174

Remove subtransaction from OverwriteProjectService

See merge request gitlab-org/gitlab!69079

Remove "not_used" and add "active" metric statuses.

See merge request gitlab-org/gitlab!68592

Add missing GraphQL ids

See merge request gitlab-org/gitlab!68948

Update list of forbidden tables when creating indexes

See merge request gitlab-org/gitlab!68913

Docs: remove duplicated "project bot user" section

See merge request gitlab-org/gitlab!69033

When all references in a system note are checked, it's not reliable to
check if there was any not-visible reference returned by an individual
parser because that reference could be satisfied by another parser.

Instead we check if in the end all nodes were visible.

Changelog: fixed

Enable `assumeImmutableResults` in test-case create form

See merge request gitlab-org/gitlab!68971

Removes load_balancing_for_expire_job_cache_worker FF

See merge request gitlab-org/gitlab!69004

Add Code Review metadata to MR versions doc page

Update Content Editor Packages

See merge request gitlab-org/gitlab!69081

Use linear version of groups_including_descendants_by

See merge request gitlab-org/gitlab!68835