Remove access_level index from runner. Add protected on ci_pipelines. Add protected index on ci_builds.

Re-organize schema. Drop protected from runner. Add access_level to runner. Drop protected from pipeline. Add protected to ci_bilds.

Solution 1. Persists protected(ref) flag on ci_pipelines table. builds_for_shared_runner and builds_for_specific_runner read the flag instead of executing protected_for? one by one.

Issue discussions Vue refactor

See merge request !12069

Ensure `issuables_count_for_state` returns the requested state count

Closes #37353

See merge request !14005

We were incorrectly stubbing `Issues::MoveService#execute`. This only
caused a failure when another spec caused it to be autoloaded --
`spec/controllers/projects/issues_controller_spec.rb` in this case.

Add settings for minimum key strength and allowed key type

Closes #17849

See merge request !13712

Remove issuable finder count caching

See merge request !13959

Make pipeline dropdowns consistent

See merge request !13530

Reduce duration and complexity of spec/features/issues/filtered_search/filter_issues_spec.rb

See merge request !13973

Optimize notification emails specs

See merge request !13986