Intent of multiple_contexts_with_metadata_are_independent

All 12 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 12 tests
- server/ 12 tests
  - common/ 1 test
    
    contextutil/ 1 test
    
    TestContextHasMetadata/ 1 test
    
    go.temporal.io/server/common/contextutil/TestContextHasMetadata/multiple_contexts_with_metadata_are_independent Introduced here
  - temporal/ 4 tests
    
    TestNewServerWithOTEL/ 2 tests
    
    go.temporal.io/server/temporal/TestNewServerWithOTEL/with_OTEL_Collector_running Inherited collector.go ×7
    
    go.temporal.io/server/temporal/TestNewServerWithOTEL/without_OTEL_Collector_running Inherited fx.go ×1
    
    go.temporal.io/server/temporal/TestNewServer Inherited TestNewServer
    
    go.temporal.io/server/temporal/TestNewServerWithJSONEncoding Inherited metric_client.go ×3
  - temporaltest/ 6 tests
    
    go.temporal.io/server/temporaltest/ExampleNewServer Inherited logger.go ×1
    
    go.temporal.io/server/temporaltest/TestClientWithCustomInterceptor Inherited telemetry.go ×2
    
    go.temporal.io/server/temporaltest/TestDefaultWorkerOptions Inherited common.go ×1
    
    go.temporal.io/server/temporaltest/TestNewServer Inherited TestNewServer
    
    go.temporal.io/server/temporaltest/TestNewWorkerWithOptions Inherited workflow_handler.go ×11
    
    go.temporal.io/server/temporaltest/TestSearchAttributeRegistration Inherited visibility_store.go ×17
  - tests/ 1 test
    
    testcore/ 1 test
    
    TestFunctionalTestBaseSuite/ 1 test
    
    go.temporal.io/server/tests/testcore/TestFunctionalTestBaseSuite/TestWorkerServiceHealthCheck Inherited onebox.go ×75