Speed up and fix flakiness for e2e tests

[KeranYang]

### Tasks
- [ ] https://github.com/numaproj/numaflow/issues/1727
- [ ] https://github.com/numaproj/numaflow/issues/1620
- [ ] https://github.com/numaproj/numaflow/issues/1582
- [ ] https://github.com/numaproj/numaflow/issues/1550
- [ ] https://github.com/numaproj/numaflow/issues/1180
- [ ] https://github.com/numaproj/numaflow/issues/1964
- [ ] numaflow installation timeout: https://github.com/numaproj/numaflow/actions/runs/10460461436/job/28966678260 jetstream-e2e
- [ ] https://github.com/numaproj/numaflow/pull/1961
- [ ] https://github.com/numaproj/numaflow/issues/1996
- [ ] timeout waiting for isb service ready: https://github.com/KeranYang/numaflow/actions/runs/10549896856/job/29230855579