Notify GitLab Plugin: add shortDescription option

[Breuls]

What does this change?

It adds the option shortDescription to the Notify GitLab Plugin. I took the liberty of copying the implementation from the GitHub 'with API' plugin, which already did exactly what I was looking for.

I used a new config parameter for the plugin and then passed it through from the GitLabNotifierPlugin class to the functions in use-cases.ts and then to the config object for the comment function. This adds the name of the new parameter in a lot of places in those files, which may look a bit messy. However, the only alternative I could think of was adding it to the notifyParams. Doing that potentially impacts code in other places, which I thought was a bit overkill.

Let me know if you'd rather see it added to notifyParams.

In addition to the changes, I added tests to the files that I changed, covering all lines, branches, et cetera.

References

N/A

Screenshots

N/A

What can I check for bug fixes?

N/A - No bugs.

The functional change is: set shortDescription to true. The comment posted to GitLab will then be a short table summary instead of a sea of coloured icons.

[Breuls]

I added another commit: I discovered that because the code in create-comment.ts was indented, the table Markdown in the comment was also indented and that caused GitLab to interpret those lines as "code", which means that it was printed in a code block instead of converted to HTML.

The added commit adds a replace call to the output, plus a test to confirm that it works correctly.