Add "Retrigger all failed test jobs" to push action menu.

[fqueze]

• Adds a "Retrigger all failed test jobs" option to the push action menu on the /jobs page, placed between the "Add new job" and "Trigger missing jobs" items:

• Filters for test failures only, excluding linting jobs (platform === "lint" or job_type_symbol === "mozlint") and build jobs (job_type_name contains "build"), matching the server-side classification used in push health
• Shows a confirmation dialog with the count of jobs to retrigger, or a warning if there are no failed test jobs