Allow the primary GDK to run tests that need a Geo tracking DB

What does this merge request do and why?

Allow the primary GDK to run tests that need a Geo tracking DB.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Set up Geo. Or this might work in gdk.yml:

   ---
   geo:
     enabled: true

2. Check out this merge request's branch.

3. Try to run a test that needs the Geo tracking database:

   ❯ bin/rspec ee/spec/models/geo/package_file_registry_spec.rb:39
   Running via Spring preloader in process 17645
   Run options: include {:focus=>true, :locations=>{"./ee/spec/models/geo/package_file_registry_spec.rb"=>[39]}}
   
   Test environment set up in 1.769237 seconds
   F
   
   Failures:
   
     1) Geo::PackageFileRegistry.find_registry_differences with selective sync disabled finds unused and untracked items
        Failure/Error: super
        
        Geo::TrackingBase::SecondaryNotConfigured:
          Geo secondary database is not configured
        # ./ee/app/models/geo/tracking_base.rb:26:in `connection'
        # ./app/models/concerns/sha_attribute.rb:52:in `load_schema!'
        # ./ee/spec/models/geo/package_file_registry_spec.rb:32:in `block (3 levels) in <main>'
        # ./spec/spec_helper.rb:451:in `block (3 levels) in <main>'
        # ./lib/gitlab/sidekiq_sharding/validator.rb:42:in `enabled'
        # ./spec/spec_helper.rb:450:in `block (2 levels) in <main>'
        # ./spec/spec_helper.rb:445:in `block (3 levels) in <main>'
        # ./spec/support/sidekiq_middleware.rb:9:in `with_sidekiq_server_middleware'
        # ./spec/spec_helper.rb:436:in `block (2 levels) in <main>'
        # ./spec/spec_helper.rb:432:in `block (3 levels) in <main>'
        # ./lib/gitlab/application_context.rb:70:in `with_raw_context'
        # ./spec/spec_helper.rb:432:in `block (2 levels) in <main>'
        # ./spec/spec_helper.rb:261:in `block (2 levels) in <main>'
        # ./spec/support/system_exit_detected.rb:7:in `block (2 levels) in <main>'
        # ./spec/support/database/prevent_cross_joins.rb:106:in `block (3 levels) in <main>'
        # ./spec/support/database/prevent_cross_joins.rb:60:in `with_cross_joins_prevented'
        # ./spec/support/database/prevent_cross_joins.rb:106:in `block (2 levels) in <main>'
        # -e:1:in `<main>'
   
   Finished in 5.65 seconds (files took 2.71 seconds to load)
   1 example, 1 failure
   
   Failed examples:
   
   rspec ./ee/spec/models/geo/package_file_registry_spec.rb:39 # Geo::PackageFileRegistry.find_registry_differences with selective sync disabled finds unused and untracked items
   
   Randomized with seed 56370
   
   [TEST PROF INFO] Time spent in factories: 00:01.475 (18.33% of total time)

4. Run gdk reconfigure to check if regenerating all configuration is successful.

   --------------------------------------------------------------------------------
   Ensuring GDK managed configuration files are up-to-date
   --------------------------------------------------------------------------------
   
   'gitlab/config/database.yml' has incoming changes:
   -------------------------------------------------------------------------------------------------------------
   @@ -45,3 +45,12 @@ test: &test
        prepared_statements: false
        variables:
          statement_timeout: 120s
   +  geo:
   +    adapter: postgresql
   +    encoding: unicode
   +    database: gitlabhq_geo_test
   +    database_tasks: true
   +    host: /Users/mkozonogitlab/Developer/gdk/postgresql
   +    port: 5432
   +    pool: 5
   +    gssencmode: disable
   
   -------------------------------------------------------------------------------------------------------------

5. cd gitlab

6. Try to run the same test again:

   ❯ bin/rspec ee/spec/models/geo/package_file_registry_spec.rb:39
   Running via Spring preloader in process 19930
   Run options: include {:focus=>true, :locations=>{"./ee/spec/models/geo/package_file_registry_spec.rb"=>[39]}}
   
   Test environment set up in 2.339754 seconds
   .
   
   Finished in 6.82 seconds (files took 2.37 seconds to load)
   1 example, 0 failures
   
   Randomized with seed 27286
   
   [TEST PROF INFO] Time spent in factories: 00:02.002 (22.54% of total time)

Impacted categories

The following categories relate to this merge request:

• gdk-reliability - e.g. When a GDK action fails to complete.
• gdk-usability - e.g. Improvements or suggestions around how the GDK functions.
• gdk-performance - e.g. When a GDK action is slow or times out.

Merge request checklist

• This change is backward compatible. If not, please include steps to communicate to our users.
• [-] Tests added for new functionality. If not, please raise an issue to follow-up.
• Documentation added/updated, if needed.
• [-] Announcement added, if change is notable.
• [-] gdk doctor test added, if needed.
• [-] Add the ~highlight label if this MR should be included in the CHANGELOG.md.