This avoids an unnecessary call to Gitaly and reduces gRPC errors.

* Closes https://gitlab.com/gitlab-org/gitaly/issues/1425
* Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/58572

This assignment is only used by the Projects::NetworkController, so
we're needlessly assigning this very generically-named instance variable
on every controller which includes `ExtractsPath`, which is quite a few.

Further, the way we were passing this hash to
`HashWithIndifferentAccess` caused the following deprecation warning
after upgrading to Rails 5:

    DEPRECATION WARNING: #to_hash unexpectedly ignores parameter
    filtering, and will change to enforce it in Rails 5.1. Enable
    `raise_on_unfiltered_parameters` to respect parameter filtering,
    which is the default in new applications. For the existing
    deprecated behaviour, call #to_unsafe_h instead. (called from new at
    lib/extracts_path.rb:116)

Enables frozen for the following:

* lib/*.rb
* lib/banzai/**/*.rb
* lib/bitbucket/**/*.rb
* lib/constraints/**/*.rb
* lib/container_registry/**/*.rb
* lib/declarative_policy/**/*.rb

Partially addresses #47424.

Attempting to view an annotated tag in the TreeController would result
in `NoMethodError: undefined method 'tree'` when Rugged was in use.
`Blob#find_by_rugged` assumes that the ref is a true. Using
the commit ID ensures that the right ref is being used.

Note that in 11.1, `Blob#find` no longer uses Rugged, so this is only
a bug in 11.0.

Closes gitlab-org/gitlab-ce#47797

* 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
  ...