Expose composite resource ready state in function response

[tenitski]

Description of your changes

Allows to set composite resource Ready state via annotation gotemplating.fn.crossplane.io/ready, similarly how this is done for composed resources.

This PR introduces a new usage scenario for unnamed composite resources. Previously, it was used only for passing Status; now, it also supports passing the gotemplating.fn.crossplane.io/ready annotation.

The additional change in this PR is that if Status is empty and a resource was used solely to pass the annotation, we will not set an empty Status value. Before it was not a problem because Status was always there.

Fixes #153

I have:

• Read and followed Crossplane's contribution process.
• Added or updated unit tests for my change.

[tenitski]

@bobh66 now after main was updated to SDK 0.5.0 all deps for my branch are there and it is ready for review.

[bobh66]

Thanks @tenitski - can you give a few more details on what's changing? It seems like a lot of code changes that are unrelated to the composite readiness. It appears to have something to do with merging status updates? Thanks

[tenitski]

@bobh66 i've updated the PR description to clarify the changes

[tenitski]

Still looking forward to have this PR reviewed and merged. We have been running this code in production for over six months now.

[tenitski]

@bobh66 👋

[tenitski]

@bobh66 I fixed lint & unit test, I still see one lint error but it exists in main as well 🤷

[tenitski]

Yay all green