fix: #895 append _py if ending with .py

[rbuckland]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature (please, look at the "Scope of the project" section in the README.md file)
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: #895

What is the new behavior?

rpyc dependency generates separate py_binary rules.

Does this PR introduce a breaking change?

• Yes
• No
• Unsure

Other information

[alexeagle]

My understanding is that this is breaking, yes. Users may have to add back the _py suffix if they're already using one of these. But it was documented as an "extreme edge case" and you're right that removing .py suffix is a recipe for collisions, so I think this is okay. Thanks!