Resolve "Improve copy of pipelines in the Merge Request widget"

What does this MR do?

This MR implements the copy updates requested in #196861 (closed).

Screenshots

Tktk

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Code review guidelines
• Style guides

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.