Remove sfc_issue_boards feature flag and friends

Closes #212300

See merge request gitlab-org/gitlab!32661

Delete now-unused HAML templates

Change CI variable font family to monospace

See merge request gitlab-org/gitlab!34788

Remove "Edit dashboard" button from self monitoring dashboard

See merge request gitlab-org/gitlab!35521

Fix exception handler in changelog Dangerfile

See merge request gitlab-org/gitlab!35656

Add cluster reindexing feature to our ES integration

Closes #213629

See merge request gitlab-org/gitlab!34069

This MR automates steps for the cluster reindexing process
Elastic::ClusterReindexingService is the main class responsible for
the reindexing process

Update deleted and redirected handbook links

See merge request gitlab-org/gitlab!35704

Many handbook pages were changes, redirected, or
deleted. Updates all affected links

Add check for "secrets" runner feature

See merge request gitlab-org/gitlab!34813

Refactor `3_create/gitaly/high_availability_spec.rb` to use `let` syntax

See merge request gitlab-org/gitlab!34222

Use snake_case for metrics data and save them in a fixture

Closes #215316

See merge request gitlab-org/gitlab!33574

Require k8s cluster for DAST template

See merge request gitlab-org/gitlab!35259

During transition to rules syntax, we missed the condition required to
ensure DAST jobs only execute if a cluster is present. Replacing the
previous `only:kubernetes` behavior, we need `CI_KUBERNETES_ACTIVE`

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/224117

Move cluster_health frontend files to core

See merge request gitlab-org/gitlab!35198

More consistency for Vale style files

See merge request gitlab-org/gitlab!35701

This builds on top of
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/34587 to add check
if "secrets" is feature supported by the runner.

Related to https://gitlab.com/gitlab-org/gitlab/-/issues/28321 and
https://gitlab.com/gitlab-org/gitlab/-/issues/218746.

Clarifying Fast SSH lookup tests, SELinux support

See merge request gitlab-org/gitlab!33470

Remove sentence about the end of /help

See merge request gitlab-org/gitlab!35673

Mark default value for artifacts

See merge request gitlab-org/gitlab!35658

Geo - Does not sync LFS objects from fork networks

Closes #225427

See merge request gitlab-org/gitlab!35692

Add scanner column to the project-level security dashboard and pipeline security tab

See merge request gitlab-org/gitlab!35150

Quarantine instance_audit_logs_spec.rb

See merge request gitlab-org/gitlab!35654

Include snippets_size statistic inside RootStorageStatistics

See merge request gitlab-org/gitlab!35601

Add snippets_size to RootStorageStatisticsType

See merge request gitlab-org/gitlab!35586

Improve package factory to fix spurious spec

See merge request gitlab-org/gitlab!35410

Fix a few package factories which don't
work on their own.

Remove OnBoarding tour - FE

See merge request gitlab-org/gitlab!35442

Add instrumentation to Gitaly streamed responses

See merge request gitlab-org/gitlab!35283

Docs: review add_remove_clusters

Closes gitlab-com/support/support-team-meta#2292

See merge request gitlab-org/gitlab!33311

Merge branch '218794-restructure-documentation-to-consolidate-vulnerability-management-features' into 'master'

Security Dashboard doc improvements

See merge request gitlab-org/gitlab!35558

Added screenshots with nav hidden
Consolidated vuln export report info
Removed out of date and incorrect  info

Docs: shared runner update

See merge request gitlab-org/gitlab!35546