tests: get rid of test_clone

[skshetry]

This clones a remote repo.

scmrepo/tests/test_scmrepo.py

Lines 11 to 18 in dbfdb67

	def test_clone(tmp_dir: TmpDir, matcher: Type[Matcher]):
	progress = MagicMock()
	url = "https://github.com/iterative/dvcyaml-schema"
	Git.clone(url, "dir", progress=progress)
	progress.assert_called_with(matcher.instance_of(GitProgressEvent))
	assert (tmp_dir / "dir").exists()

We should replace this with tests testing:

• clone with file://
• clone local directory
• clone with ssh
• clone with http(s)
• push_refspec with progress
• clone with progress
• fetch_refspec with progress