Intent of nil_member_counter, no_per_cluster_limit

All 3 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 3 tests
- server/ 3 tests
  - common/ 3 tests
    
    quotas/ 3 tests
    
    calculator/ 3 tests
    
    TestClusterAwareQuotaCalculator_GetQuota/ 3 tests
    
    go.temporal.io/server/common/quotas/calculator/TestClusterAwareQuotaCalculator_GetQuota/nil_member_counter Introduced here
    
    go.temporal.io/server/common/quotas/calculator/TestClusterAwareQuotaCalculator_GetQuota/no_hosts Inherited no_hosts
    
    go.temporal.io/server/common/quotas/calculator/TestClusterAwareQuotaCalculator_GetQuota/no_per_cluster_limit Introduced here