Prevent schema.rb reverting from datetime_with_timezone to datetime

Closes #39289

See merge request gitlab-org/gitlab-ce!14956

Execute project hooks and services after commit when moving an issue

Closes #41324

See merge request gitlab-org/gitlab-ce!16108

Signed-off-by: Rémy Coutable <remy@rymai.me>

* upstream/master: (671 commits)
  Make rubocop happy
  Use guard clause
  Improve language
  Prettify
  Use temp branch
  Pass info about who started the job and which job triggered it
  Docs: add indexes for monitoring and performance monitoring
  clearer-documentation-on-inline-diffs
  Add docs for commit diff discussion in merge requests
  sorting for tags api
  Clear BatchLoader after each spec to prevent holding onto records longer than necessary
  Include project in BatchLoader key to prevent returning blobs for the wrong project
  moved lfs_blob_ids method into ExtractsPath module
  Converted JS modules into exported modules
  spec fixes
  Bump gitlab-shell version to 5.10.3
  Clear caches before updating MR diffs
  Use new Ruby version 2.4 in GitLab QA images
  moved lfs blob fetch from extractspath file
  Update GitLab QA dependencies
  ...

Update flipper to 0.11.0 and take advantage of the new features

See merge request gitlab-org/gitlab-ce!15920

- Added an ActiveSupport (using Rails.cache) caching adapter
- Overview of the new features can be found at https://johnnunemaker.com/flippin-features-at-runtime/
- Full Changelog can be found at https://github.com/jnunemaker/flipper/blob/v0.11.0/Changelog.md

Signed-off-by: Rémy Coutable <remy@rymai.me>