Co-authored-by: Gabriel Mazetto <gabriel@gitlab.com>

- placing an ee only class under an ee/**/ee subdirectory
  is not the right placement and we should alert on it.
- see https://docs.gitlab.com/ee/development/ee_features.html#extend-ce-features-with-ee-backend-code
- see https://gitlab.com/gitlab-org/gitlab/-/issues/378167

It is automatically required by `.rspec` configuration

Adds an upgrade path helper that can be used to determine
next and previous required stops, or if the current
version is a required stop. Looks both at an upgrade
path file, or fills in the upcoming planned stops.

Related to: https://gitlab.com/gitlab-org/gitlab/-/issues/481816

This reverts commit 8000f199, reversing
changes made to de0dbba7.
[skip secret push protection]

Changelog: changed

WIP use diffblobs

WIP changes to scan logic

Sorta almost working

Add secrets check comments

New method to get blob diffs

Filter out by length and binary

Remove unintended changes

Remove extra whitespace

Remove unused methods

Use patch bytes limit

Add a spec

Add gitaly client diff service

Use gitaly diff client

Fix specs using diffblobs

Add spec for secret in existing file but not in diffs

Add spec for multiple commits

Fix some secrets check specs

Remove unneeded changes to rubocop todo

Fix scan specs -- look into runtime

Fix linelength errors

Add secrets check specs

Fix spec failures

Clean up specs

Remove troubleshooting section from docs

Add blob details to scan

* Remove redundant setting of @config
* Use Google defined environment variables for authentication
* Remove extraneous testing

- Fix double render for omniauth callbacks controller test
- Specify keys as symbols into InheritableOptions

While running `gitlab-ctl reconfigure` or `gitlab-rails console`,
I was seeing these messages spew:

```
$ sudo gitlab-rails c
find: ‘spec/*’: No such file or directory
find: ‘spec/*’: No such file or directory
```

Via `strace` I saw the `execve()` for `find` starting after opening
`openbao_client.gemspec`.

Fix this by using the Ruby `Dir` path instead.