[test] Increase `retry` timeouts for two flaky `app-action` tests (#91647)
- [Flakiness metric for `should handle redirects to routes that provide
an invalid RSC
response`](https://app.datadoghq.com/ci/test/runs?query=test_level%3Atest%20%40git.repository.id%3A%22github.com%2Fvercel%2Fnext.js%22%20%40test.name%3A%22app-dir%20action%20handling%20fetch%20actions%20should%20handle%20redirects%20to%20routes%20that%20provide%20an%20invalid%20RSC%20response%22%20%40test.type%3A%22nextjs%22%20%40test.status%3A%22fail%22&agg_m=count&agg_m_source=base&agg_t=count¤tTab=overview&eventStack=&fromUser=false&graphType=flamegraph&index=citest&start=1773313490002&end=1773918290002&paused=false)
- [Flakiness metric for `should work with interception
routes`](https://app.datadoghq.com/ci/test/runs?query=test_level%3Atest%20%40git.repository.id%3A%22github.com%2Fvercel%2Fnext.js%22%20%40test.name%3A%22app-dir%20action%20handling%20should%20work%20with%20interception%20routes%22%20%40test.type%3A%22nextjs%22%20%40test.status%3A%22fail%22&agg_m=count&agg_m_source=base&agg_t=count&fromUser=false&index=citest&start=1773313571516&end=1773918371516&paused=false)