Enable multiple git revisions (Jan-Apr 2024) : temporary, using revision name in repo localPath

[marcodelapierre]

This is spawned out of #4659 .

Original attempt, using revisions not commit IDs, in localPath (as per original thread).

This PR is for the record and for reference, unlikely to go forward.

Pros:

• simple implementation

Cons:

• if project is updated, running pipelines with same project will see underlying pipeline files change during the run. Troublesome when using run -latest and in multi-user settings
• AssetManager instantiates itself circularly to gather info on default branch (to avoid local duplication of default branch directories)

@pditommaso for visibility.