fix(CI): Re-enable retries for bundler integration tests (#77265)
These retries were breaking CI (too slow, causing timeouts) when most of
these tests were failing, but now that most of the tests are passing,
re-enable retries because many tests have some amount of flakiness.
- Development tests:
https://github.com/vercel/next.js/actions/runs/13936223704
- Production build tests:
https://github.com/vercel/next.js/actions/runs/13936225174