Fix workflow interceptor is not propagated correctly for child workflows in TestWorkflowEnv (#1289)

<!-- Describe what has changed in this PR -->
**What changed?**

Workflow interceptor in child env is not populated from parent env. 

<!-- Tell your future self why have you made these changes -->
**Why?**

This is needed to correctly mock production env

Author: shijiesheng

internal/internal_workflow_testsuite.go

@@ -363,6 +363,7 @@ func (env *testWorkflowEnvironmentImpl) newTestWorkflowEnvironmentForChild(param
 	childEnv.testWorkflowEnvironmentShared = env.testWorkflowEnvironmentShared
 	childEnv.workerOptions = env.workerOptions
 	childEnv.workerOptions.DataConverter = params.dataConverter
+	childEnv.workflowInterceptors = env.workflowInterceptors
 	childEnv.registry = env.registry
 
 	if params.workflowID == "" {