Skip SAML SSO specs

What does this MR do?

Skips SAML SSO specs temporarily because merging the change in gitlab-qa!379 (merged) would break these tests. These will be un-skipped in !24172 (merged)

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content