Lengthen test-new-tests deploy artifact retry to ~5 minutes
Test new and changed tests when deployed (1/5) and the cache-components
variant kept failing inside this PR's CI runs because the deploy preview
tarball job is racing in a separate workflow and the test bailed after
only 25 seconds of retries (5 attempts at 5s). Bump to 30 attempts at 10s
each so we absorb several minutes of lag without flaking.
Co-authored-by: Cursor <cursoragent@cursor.com>
