fix(pypi): finish PEP508/PEP440 impl for version matching (#2856)

This reuses the previous work by @vonschultz who implemented
a PEP440 version normalizer. We extend it and use it in the
PEP508 marker evaluation.

Summary:
- Extend the normalization parser to output individual parts
  of the versions to the parsing context.
- Re-implement all of the version comparison calls to use the
  parsed version.
- Add extra validation for `.*` usage in the environment markers
- Fallback to non-version matching in the environment markers
  if one of the sides is not a version.
- Rename the original normalizer file to `version.bzl` because
  as far as Python is concerned this is the only version that
  there can be. We could in theory probably reuse this in other
  code where we are parsing the Python interpreter version many
  times, but this is left for the future.

Fixes #2826
Work towards #2821

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Co-authored-by: Richard Levasseur <richardlev@gmail.com>
Co-authored-by: Richard Levasseur <rlevasseur@google.com>