Rename pipeline_actions component

What does this MR do?

This renames the pipelines_action.vue component to pipelines_manual_actions.vue to make it more semantically accurate

#300925 (closed)

Screenshots (strongly suggested)

N/A

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