Hide Status Page Operations Settings behind a beta feature flag

What does this MR do?

This adds a check for the status_page Feature to check for the the feature being explicitly enabled.

Previously we were just using Project.feature_available? which is implicitly enabled by default.

Changelog not needed as it's part of a feature added in %12.9. (Feature MR was here: !25820 (merged))

Does this MR meet the acceptance criteria?

Conformity

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

Closes #210030 (closed)