Add support for GitLab Code Quality reports

This commit adds support for enabling [GitLab Code Quality](https://docs.gitlab.com/ee/ci/testing/code_quality.html)
reports. I've not enabled it by default (in `config_defaults.yml`), but
this is something that perhaps we could do at a later date following any
user feedback.

Meanwhile, the following module `.sync.yml` content can be used to turn
it on.

```yaml
.gitlab-ci.yml:
  custom:
    ruby_versions:
      '2.7.2':
        code_quality: true
```

README.md

@@ -82,7 +82,7 @@ Gitlab CI uses a .gitlab-ci.yml file in the root of your repository tell Gitlab
 | cache          | If this setting exists, it expects a single sub-key called `paths`. `paths` is an array of paths that will be cached for each subsequent job. Defaults to `['vendor/bundle']`|
 | tags           | If this setting exists, it expects an array of tags that will be added to each job. Not set by default.|
 | bundler\_args   |Define any arguments you want to pass through to bundler. The default is `--without system_tests --path vendor/bundle --jobs $(nproc)` which avoids installing unnecessary gems while installing them to the `vendor/bundler.|
-| ruby_versions  |Define a list of ruby_versions to test against. Each version can have a series of sub-keys that are options. `checks` is the rake command(s) to run during the job. `puppet_version` sets the PUPPET_GEM_VERSION environment variable. `allow_failure` is an array of `checks` where you want to allow failures. `tags` is an array of Gitlab CI Runner tags. |
+| ruby_versions  |Define a list of ruby_versions to test against. Each version can have a series of sub-keys that are options. `checks` is the rake command(s) to run during the job. `puppet_version` sets the PUPPET_GEM_VERSION environment variable. `allow_failure` is an array of `checks` where you want to allow failures. `tags` is an array of Gitlab CI Runner tags. `code_quality` is a boolean that when enabled adds [Code Quality](https://docs.gitlab.com/ee/ci/testing/code_quality.html) reports to jobs that run puppet-lint (version [3.2.0](https://github.com/puppetlabs/puppet-lint/blob/main/CHANGELOG.md#v320---2023-02-28) onwards). |
 | ruby_versions\\{job}\\**except/only**|Basic `except`/`only` is an hash of `checks` with array of references of conditions for the `checks`:<br><br><pre>ruby_versions:<br>&nbsp;&nbsp;2.4.9:<br>&nbsp;&nbsp;&nbsp;&nbsp;except:<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;unit:<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- tags<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- main</pre><br><br>Advanced `except`/`only` is an hash of `checks` with hash using 4 keywords `'variables', 'refs', 'changes', 'kubernetes'` each with it's own array of references or conditions for the `checks`:<br><br><pre>ruby_versions:<br>&nbsp;&nbsp;2.4.9:<br>&nbsp;&nbsp;&nbsp;&nbsp;except:<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;unit:<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;refs:<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- tags<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- main<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;variables:<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- $CI_COMMIT_MESSAGE =~ /\[skip[ _-]tests?\]/i</pre> https://docs.gitlab.com/ce/ci/yaml/README.html#onlyexcept-advanced |
 | custom_jobs    |Define custom Gitlab CI jobs that will be executed. It is recommended that you use this option if you need customized Gitlab CI jobs. Please see the [.gitlab-ci.yml](https://docs.gitlab.com/ce/ci/yaml/README.html) docs for specifics.|
 | rubygems_mirror | Use a custom rubygems mirror url |

moduleroot/.gitlab-ci.yml.erb

@@ -112,11 +112,20 @@ default:
 <%       if options['rubygems_version'] -%>
     RUBYGEMS_VERSION: '<%= options['rubygems_version'] -%>'
 <%       end -%>
+<%       if options['code_quality'] and check =~ %r{\blint\b}-%>
+    CODECLIMATE_REPORT_FILE: 'gl-code-quality-report.json'
+<%       end -%>
 <% if configs.has_key?('global_variables') -%>
 <%   configs['global_variables'].each do |key, value| -%>
     <%= key %>: '<%= value %>'
 <%   end -%>
 <% end -%>
+<%       if options['code_quality'] and check =~ %r{\blint\b}-%>
+  artifacts:
+    reports:
+      codequality: gl-code-quality-report.json
+    expire_in: 1 week
+<%       end -%>
 <%       if options['allow_failure'] -%>
 <%         if options['allow_failure'].include?(check) -%>
   allow_failure: true