Don't use six.text_type() in salt.utils.gitfs
Don't use six.text_type() in salt.utils.gitfs

For Python 2, Pygit2 (as well as others) store unicode strings as bytes
(e.g. ``'\xd0\x94'``), not as unicode strings. This can result in a
``UnicodeDecodeError`` being raised when ``os.path.join()`` is invoked
and Python attempts to decode the bytestring.

This commit fixes the issue by using ``str()`` to force config values to
be strings, rather than ``six.text_type()``.

Resolves #35630.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt