Intent of metric_capture.go ×2

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
  - tests/ 2 tests
    
    testcore/ 2 tests
    
    TestMetricCaptureSuite/ 2 tests
    
    TestNamespaceMetricCapture/ 2 tests
    
    go.temporal.io/server/tests/testcore/TestMetricCaptureSuite/TestNamespaceMetricCapture/can_capture_for_an_explicit_namespace Introduced here
    
    go.temporal.io/server/tests/testcore/TestMetricCaptureSuite/TestNamespaceMetricCapture/returns_only_recordings_for_the_test_namespace Introduced here