fix(local_runtime): Improve local_runtime usability in macos / windows (#3148)

local_runtime fails to handle many variations of python install on
Windows and
MacOS, such as:

* LDLIBRARY on MacOS may refer to a file under PYTHONFRAMEWORKPREFIX,
not LIBDIR
* LDLIBRARY on Windows refers to pythonXY.dll, not the linkable
pythonXY.lib
* LIBDIR may not be correctly set on Windows.
* On windows, interpreter_path needs to be normalized. Other paths also
require this.
* SHLIB_SUFFIX does not indicate the correct suffix.

For examples, see: https://docs.python.org/3/extending/windows.html

In order to resolve this the shared library resolution has been moved
into get_local_runtime_info.py, which now does the following:

* Constructs a list of paths to search based on LIBDIR, LIBPL,
PYTHONFRAMEWORKPREFIX,
  and the executable directory.
* Constructs a list of libraries to search based on INSTSONAME,
LDLIBRARY,
  pythonXY.lib, etc.
* Checks to see which files exist, partitioning the result into a list
of
  "dynamic_libraries" and "static_libraries" 

On Windows and macOS, since SHLIB_SUFFIX does not always indicate the
filenames
needed searching, this has been removed from local_runtime_repo_setup
and
replaced with an explicit file.

On Windows the interpreter_path and other search paths are now
normalized
(`\` converted to `/`).

Additional logging added to local_runtime_repo.

Fixes https://github.com/bazel-contrib/rules_python/issues/3055
Work towards https://github.com/bazel-contrib/rules_python/issues/824

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