feat: add interpreter_version_info to py_runtime

[mattem]

Adds an interpreter_version_info attribute to the py_runtime and associated provider that maps to the sys.version_info values. This allows the version of the interpreter to be known statically, which can be useful for rule sets that depend on the interpreter, and need to build environments / pathing that contain version info (virtualenvs for example).

[f0rmiga]

I'll let other folks bikeshed if they want.

[rickeylev]

My main comment is to use a dict/struct instead of list. This makes it easier to know which parts are check for the relevant pieces. Plus we can stash extra implementation-specific parts in there if necessary.

i.e. accept a attr.string_dict on the rule and and convert it to a struct() for the provider. Convert particular keys to their appropriate types (e.g. major/minor/patch to ints, similar to sys.version_info)

Please add tests. You can add them to //tests/py_runtime

[mattem]

@rickeylev Can I have another pass on this please?

[rickeylev]

Looks pretty good! Thank you for adding tests.

Can you please add an entry to CHANGELOG.md? Then it's ready to merge.