Remove Security Dashboard button from project page

What does this MR do?

Because it duplicates navigation on left sidebar. And having too many buttons on project page does not help ease of use. Closes #202289 (closed)

Screenshots

Before	After

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