Support annotated tags in pygit2 git provider

[ghost]

What does this PR do?

This PR adds a fix for Issue #56451

What issues does this PR fix or reference?

#56451

Previous Behavior

Using annotated tags with PyGit2 as backend for the gitfs_remote feature just did not work as checkout failed.

New Behavior

Using annotated tags with PyGit2 as backend for the gitfs_remote feature is possible, checkouts work.

Tests written?

Yes

Commits signed with GPG?

Yes

[DmitryKuzmenko]

@afischer-opentext-com thank you for PR. The code looks good for me. Thanks for the test. Could you please check my review comments?

[DmitryKuzmenko]

@afischer-opentext-com the tests failures are related. Could you please protect the test to run in non-pygit2 supported environments? You can find an example here:

salt/tests/unit/fileserver/test_gitfs.py

Lines 564 to 565 in 5c450f3

	@skipIf(not HAS_PYGIT2, 'pygit2 >= {0} and libgit2 >= {1} required'.format(PYGIT2_MINVER, LIBGIT2_MINVER))
	@skipIf(salt.utils.platform.is_windows(), 'Skip Pygit2 on windows, due to pygit2 access error on windows')

[ghost]

@DmitryKuzmenko , is everything okay with the Jenkins host? I tried to look at the failured jobs but found so far no evidence that the changes are responsible for this. I have to admit not every log was accessible and some jobs are still running (e.g. Windows 2019), even if reported as failure here.

[DmitryKuzmenko]

re-run full amazon2-py2
re-run full centos6-py2
re-run full centos7-py2-m2crypto
re-run full centos7-py2-pycryptodomex
re-run full centos7-py2-tcp
re-run full fedora30-py2
re-run full macosxmojave-py2
re-run full windows2016-py2
re-run full windows2019-py2
re-run full ubuntu1604-py3
re-run full ubuntu1604-py3-pycryptodomex
re-run full ubuntu1604-py3-tcp

[ghost]

Thank you! The left two jobs seem to be again timeout related.

[DmitryKuzmenko]

@afischer-opentext-com could you please resolve merge conflicts?