Intent of test_engine.go ×4

All 4 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 4 tests
- server/ 4 tests
  - chasm/ 4 tests
    
    lib/ 4 tests
    
    callback/ 4 tests
    
    TestExecuteInvocationTaskNexus_Outcomes/ 4 tests
    
    go.temporal.io/server/chasm/lib/callback/TestExecuteInvocationTaskNexus_Outcomes/network-error-retry Inherited invocable_outbound.go ×2
    
    go.temporal.io/server/chasm/lib/callback/TestExecuteInvocationTaskNexus_Outcomes/non-retryable-http-error Inherited invocable_outbound.go ×1
    
    go.temporal.io/server/chasm/lib/callback/TestExecuteInvocationTaskNexus_Outcomes/retryable-http-error Inherited retryable-http-error
    
    go.temporal.io/server/chasm/lib/callback/TestExecuteInvocationTaskNexus_Outcomes/success Inherited invocable_outbound.go ×2