Support comment template management links from work item drawer

What does this MR do and why?

Fetches work item commentTemplatesPaths new field, so the user can see all available comment templates in the dropdown, from any work item view.

This specially fixes showing the work item project comment templates dropdown when opening the work item drawer from a group issues list.

References

Support comment template management links from ... (!191941 - merged)

Screenshots or screen recordings

Before	After

How to set up and validate locally

In a group and project that you are the owner:

1. Open the group issues list
2. Open a work item in the drawer view
3. Go to the comments section and click to insert a comment template
4. Click on the Manage comment templates dropdown
5. Expect to see Your comment templates, Project comment templates and Group comment templates

Do the same on the project -> issues page and the work item detail page and expect to see the same content in the dropdown. No changes there.

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Related to #524671 (closed)