Allow override of Task and Template git_branch

[Omicron7]

This adds an API option when running a Task to allow overriding the Git Branch used/cloned during the Task execution. It also add the ability to override the Git Branch used by a Template when created with the API. This is useful for running Tasks using a development, or specific release branch of a repository.

Implements #2277

[fiftin]

let's allow null value for this column.

Null value more efficient for heavily used columns in large tables.

[Omicron7]

@fiftin Updated to remove the not null constraint. I originally just copied the column from the project__repository table.

[fiftin]

Hi @Omicron7 thank you!

I think we should add ability to choose branch in template too. Not just in task. It will be logically.

[Omicron7]

@fiftin I've rebased on the latest develop and added the ability to override git_branch on a Project Template using the API. LocalJob will preference git_branch on the Task over the Template if both are set.

I'll need you to implement, or help if you'd like git_branch exposed on the front end for a Template.

[Omicron7]

dredd tests are passing locally for me using boltdb. Not sure why they are failing in GitHub Actions.

2024-09-17T15:48:55.213Z - debug: Gracefully terminating the hooks handler process
2024-09-17T15:48:55.213Z - debug: Wrapping up testing and waiting until all reporters are done
complete: 76 passing, 0 failing, 0 errors, 16 skipped, 92 total
complete: Tests took 8509ms

[Omicron7]

@fiftin This should be good to go. I realized the git_branch wasn't actually saving to the database, so I fixed that and as well as allowing null.