handling for debugging python test targets with transitions

[andponlin-canva]

Checklist

• I have filed an issue about this change and discussed potential changes with the maintainers.
• I have received the approval from the maintainers to make this change.
• This is not a stylistic, refactoring, or cleanup change.

Please note that the maintainers will not be reviewing this change until all checkboxes are ticked. See
the Contributions section in the README for more
details.

Discussion thread for this change

Issue number: 7196

Description of this change

• The change will recognize Kinds with a _transition_ prefix as being the Kind with with _transition_ prefix stripped.
• The selection of the Target to map to from a source file will avoid, where possible, any with a _ prefix.
• The Python templated aspect logic will allow the rules_python PyInfo provider to be considered with Bazel < 8. I am unsure of all the wider ramifications of this so it may require some discussion. I think internal Bazel rules were dropped on Bazel 5 so perhaps it is a reasonable assumption that the user would be using rules_python if they are using Python at all?