feat: add an option to not include copy_to_directory output in runfiles

[kormide]

Fixes #748.

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Changes are visible to end-users: yes

• Searched for relevant documentation and updated as needed: yes
• Breaking change (forces users to change their own code or config: no
• Suggested release notes appear below: yes

Added an attr add_directory_to_runfiles to copy_to_directory to not include the output directory in the target's runfiles.

Test plan

• Covered by existing test cases

[kormide]

I'm having trouble testing this one due to the issue with sh_test I pointed out for the existing test that checks that files are added to runfiles. Even after excluding them they still appear because sh_test includes default outputs of targets passed to data in its own runfiles. Can you think of a way to test this? Should I write a custom sh_test just for these tests?

Also, I don't write rules often so my knowledge around runfiles is murky. Best take a careful look at this.

[kormide]

@dieortin Does this solve your use case?

[dieortin]

@dieortin Does this solve your use case?

I haven't tested it, but it should solve it, yes!