- Add feature flag `UseKvLimitsForNewOrder`
- Add feature flag `UseKvLimitsForNewAccount`
- Flush all Redis shards before running integration or unit tests, this
avoids false positives between local testing runs
Fixes#7664
Blocked by #7676
Integrate the key-value rate limits from #6947 into the WFE. Rate limits
are backed by the Redis source added in #7016, and use the SRV record
shard discovery added in #7042.
Part of #5545