Batch GRV Rate Limit Exceeded is not always thrown

The tests noted in https://github.com/FoundationDB/fdb-record-layer/issues/2813 will occasionally run forever due to this code:
https://github.com/FoundationDB/fdb-record-layer/blob/200ac05041a1af712f621a27b4c5c37f9eab001c/fdb-record-layer-core/src/main/java/com/apple/foundationdb/record/provider/foundationdb/storestate/FDBRecordStoreStateCacheEntry.java#L97-L100

Where it is combining two futures.
The first one: `recordStore.loadRecordStoreStateAsync` is doing a regular read.
The second one is doing a snapshot get of `SystemKeyspace.METADATA_VERSION_KEY`.

The first future fails with `Batch GRV request rate limit exceeded` (code 1051).
The second future never completes.

I have tried to reproduce this in a more isolated environment, but it is proving tricky to get it to reliably start failing with `Batch GRV request rate limit exceeded`.