* master: (112 commits)
  small change to make less conflict with EE version
  Add cop for use of remove_column
  Resolve merge conflicts with dev.gitlab.org/master after security release
  add index for doc/administration/operations/
  Remove RubySampler#sample_objects for performance as well
  Bugfix: User can't change the access level of an access requester
  Add spec for removing issues.assignee_id
  updated imports
  Keep track of storage check timings
  Remove a header level in the new 'Automatic CE->EE merge' doc
  Improve down step of removing issues.assignee_id column
  Fix specs after removing assignee_id field
  Remove issues.assignee_id column
  Resolve conflicts in app/models/user.rb
  Fix image view mode
  Do not raise when downstream pipeline is created
  Remove the need for destroy and add a comment in the spec
  Use build instead of create in importer spec
  Simplify normalizing of paths
  Remove allocation tracking code from InfluxDB sampler for performance
  ...

Closes #37595

Reduced the technical debt around our JS flash function by making it a
module that is imported rather than relying on the global function.
The global function still exists mainly for technical debt with how
some requests are being completed, but new JS should import the module
directly.

Also reduces some tech debt in the file by removing the need for jQuery.
Instead Flash is now 100% vanilla JS.

Implement ability to update deploy keys

Closes #3191

See merge request !10383