In #14087, we thought it is ok to set the processed bit for every
transaction in the consensus output. But it turns out setting ignored
transaction to `processed` may prevent reverting transactions, if a
validator restarts during epoch change.

This change only avoid setting the `processed` bit for ignored
transactions. It does not completely restore the behavior before #14087.

Ran on `simtest-01` CI machine:
```
SIM_STRESS_TEST_DURATION_SECS=300  USE_MOCK_CRYPTO=1 MSIM_TEST_NUM=60 cargo simtest test_simulated_load_reconfig_with_crashes_and_delays
```

---
If your changes are not user-facing and not a breaking change, you can
skip the following section. Otherwise, please indicate what changed, and
then add to the Release Notes section as highlighted during the release
process.

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration