go1.24 removes the x509sha1 GODEBUG variable, and with it the
support for SHA-1 signed certs. This commit alters the regex
in unit tests to account for that and prep for go1.24.
Signed-off-by: Madhav Jivrajani <madhav.jiv@gmail.com>
Kubernetes-commit: cff0f4009f17c84141553c143872d47756209f4d