Merge PR #51005 into main

* refs/pull/51005/head:
	qa: fix test_nfs_export_creation_at_symlink
	qa: update test cases to check for ENOTDIR instead of EINVAL
	qa: fix test_nfs_export_with_invalid_path
	mgr/nfs: handle exceptions for cephfs_path_is_dir()
	mgr/nfs/utils: changes to helper func to check cephfs path

Reviewed-by: Venky Shankar <vshankar@redhat.com>