[FR]: Ability to set python shebang in py_unpacked_wheel

[thesayyn]

What is the current behavior?

Currently shebang in unpacked wheel binaries is set to toolchain python interpreter path which is nonexistent in containers.

Describe the feature

Is the way to customize shebang line generated by py_unpacked_wheel ?

rules_py/py/private/py_unpacked_wheel.bzl

Line 22 in d45e542

py_toolchain.python,

[alexeagle]

I imagine this is fixed as a consequence of new virtual env work?