Add developer documentation on diff handling and limits

Closes #43614

See merge request gitlab-org/gitlab-ce!18269

Use grpc 1.11.0

See merge request gitlab-org/gitlab-ce!18652

Backports EE changes from disabling branch unprotect UI

See merge request gitlab-org/gitlab-ce!18262

Don't automatically remove artifacts for pages jobs after pages:deploy has run

Closes #45481

See merge request gitlab-org/gitlab-ce!18628

Use GitLab Pages v0.9.1

Closes #45639

See merge request gitlab-org/gitlab-ce!18654

Makes namespaceless project destroy worker spec not depend on a specific migration version

See merge request gitlab-org/gitlab-ce!18650

Docs: review product categories in doc/README

Closes #45496

See merge request gitlab-org/gitlab-ce!18517

Remove legacy storage path call

See merge request gitlab-org/gitlab-ce!18598

Update index.md

See merge request gitlab-org/gitlab-ce!18450

Ports omniauth-jwt gem onto GitLab OmniAuth Strategies suite

See merge request gitlab-org/gitlab-ce!18580

Docs: update Pages for newbies

See merge request gitlab-org/gitlab-ce!18629

Resolve "Members invitations scheduled before commit"

Closes #45572

See merge request gitlab-org/gitlab-ce!18538

Move NotificationService calls to Sidekiq

Closes #43106

See merge request gitlab-org/gitlab-ce!18535

Storage shards should only be used, the exact paths are the
responsibilty of Gitaly. This will create deprecation warning, and in
this instance the path is initialized, but never used so it could be
removed.

Add sha filter to list pipelines

Closes #44880

See merge request gitlab-org/gitlab-ce!18125

Fix example config miss-alignment in uploads.object_store.connection

Closes gitlab-development-kit#342

See merge request gitlab-org/gitlab-ce!18622

Resolve "Add how to use nip.io to Auto DevOps and Kubernetes documentation"

Closes #45561

See merge request gitlab-org/gitlab-ce!18494

Remove IDE image upload spec

Closes #45045

See merge request gitlab-org/gitlab-ce!18617

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/45045

Remove comma from the time system notes

See merge request gitlab-org/gitlab-ce!18593

Repository#exists? can only be queried with Gitaly

Closes gitaly#314

See merge request gitlab-org/gitlab-ce!18567

Don't run JS lint report for QA

See merge request gitlab-org/gitlab-ce!18621

Add gitlab-pages admin ping rake task

See merge request gitlab-org/gitlab-ce!18372

Skip db related tests for QA

See merge request gitlab-org/gitlab-ce!18618

CE: Fix QA protected branches tests

See merge request gitlab-org/gitlab-ce!18585

To find the pipeline for a specific sha requires scanning the list of
all pipelines for a ref that contains the sha. This makes it hard to
find the pipeline id needed to access a trace for a specific job run
in the pipeline using the API.

and skip db related jobs for QA branches