Validate non-standard hedera.shard/hedera.realm configurations

[tinker-michaelj]

Although shard and realm are configurable, we do not have regular tests running that validate all constructed entity ids respect the configured values.

(For example, any AccountID built like AccountID.newBuilder().accountNum(X).build() will get id 0.0.X no matter if hedera.shard=1 and hedera.realm=2; instead of 1.2.X as we want.)

This issue is to,

• Update test-clients and workflows to support running PR checks with arbitrary shard and realm.
• Fix any issues surfaced by running these checks.
• Add a MAT executing at an appropriate frequency to detect regressions.