Initial Serverless Functions detailed view

What does this MR do?

Builds on the previous work with the Serverless functions view by modifying the list view to display the environment and function description while exposing a link that will render a more detailed view of the user's function and provide a call-out mechanism.

Some sample screenshots based on the initial commit:

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/54715

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer