Intent of global_rate_limit_not_configured_and_zero_per-instance_rate_limit

All 2 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 2 tests
- server/ 2 tests
  - service/ 2 tests
    
    frontend/ 2 tests
    
    TestRateLimitInterceptorProvider/ 2 tests
    
    go.temporal.io/server/service/frontend/TestRateLimitInterceptorProvider/global_rate_limit_not_configured_and_per_instance_rate_limit_is_hit Inherited global_rate_limit_not_configured_and_per_instance_rate_limit_is_hit
    
    go.temporal.io/server/service/frontend/TestRateLimitInterceptorProvider/global_rate_limit_not_configured_and_zero_per-instance_rate_limit Introduced here