t0410: mark tests to require the reffiles backend

Two of our tests in t0410 verify whether partial clones end up with the
correct repository format version and extensions. These checks require
the reffiles backend because every other backend would by necessity bump
the repository format version to be at least 1.

Mark the tests accordingly.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

t/t0410-partial-clone.sh

@@ -49,7 +49,7 @@ test_expect_success 'convert shallow clone to partial clone' '
 	test_cmp_config -C client 1 core.repositoryformatversion
 '
 
-test_expect_success SHA1 'convert to partial clone with noop extension' '
+test_expect_success SHA1,REFFILES 'convert to partial clone with noop extension' '
 	rm -fr server client &&
 	test_create_repo server &&
 	test_commit -C server my_commit 1 &&
@@ -60,7 +60,7 @@ test_expect_success SHA1 'convert to partial clone with noop extension' '
 	git -C client fetch --unshallow --filter="blob:none"
 '
 
-test_expect_success SHA1 'converting to partial clone fails with unrecognized extension' '
+test_expect_success SHA1,REFFILES 'converting to partial clone fails with unrecognized extension' '
 	rm -fr server client &&
 	test_create_repo server &&
 	test_commit -C server my_commit 1 &&