Intent of test_cluster_pool.go ×8

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
  - tests/ 3 tests
    
    testcore/ 3 tests
    
    TestClusterPool_MaxLeasesRecyclesOnNextAcquire/ 1 test
    
    go.temporal.io/server/tests/testcore/TestClusterPool_MaxLeasesRecyclesOnNextAcquire/uses_cluster Introduced here
    
    go.temporal.io/server/tests/testcore/TestClusterPool_MaxLeasesWaitsForActiveLeases Introduced here
    
    go.temporal.io/server/tests/testcore/TestClusterPool_PoisonedActiveClusterSwapsWithoutRecycling Inherited test_cluster_pool.go ×2