Frontend: Change wording on button to `Run scheduled pipeline` on pipelines page

Summary

Currently, the button states Run pipeline schedule.

To improve UX consistency with running a pipeline rather than turning on a schedule, the discussion in #482718 (comment 2096458401) has brought this issue towards changing the button to say Run scheduled pipeline instead.

Definition of Done

Renaming from Run/Edit/Delete pipeline schedule -> Run/Edit/Delete scheduled pipeline

Details

Roles involved

• Design
• Technical Writing
• Backend
• Frontend
• Test engineering

NOTE: When work is ready to be defined, please create appropriate sub-tasks.