Skip TestGitResolver_API on other archs
Skip TestGitResolver_API on other archs

Fixes #5703

Gitea doesn't support other architectures, so let's skip the test using it on s390x and ppc64e. The actual functionality being tested isn't at all arch-specific, so I don't think anything is lost by skipping it.

Signed-off-by: Andrew Bayer <584a3be2b8e7a970b37393618731e9be5df24fde@gmail.com>

tektoncd/pipeline,tektoncd/pipeline