Register system workflow activities with default worker (#5017)

<!-- Describe what has changed in this PR -->
**What changed?**
Registering system workflow activities with the default worker.

<!-- Tell your future self why have you made these changes -->
**Why?**
This is to prevent running workflows from getting stuck when upgrading
to 1.23 and will be removed in 1.24.

<!-- How have you verified this change? Tested locally? Added a unit
test? Checked in staging env? -->
**How did you test it?**
Existing tests

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change to production? -->
**Potential risks**
None

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sent to the broader community? (Yes/No) -->
**Is hotfix candidate?**
No

service/worker/migration/fx.go

@@ -75,8 +75,6 @@ func (wc *replicationWorkerComponent) RegisterWorkflow(registry sdkworker.Regist
 	registry.RegisterWorkflowWithOptions(ForceReplicationWorkflow, workflow.RegisterOptions{Name: forceReplicationWorkflowName})
 	registry.RegisterWorkflowWithOptions(NamespaceHandoverWorkflow, workflow.RegisterOptions{Name: namespaceHandoverWorkflowName})
 	registry.RegisterWorkflow(ForceTaskQueueUserDataReplicationWorkflow)
-
-	registry.RegisterActivity(wc.activities().GetMetadata) // may be run locally
 }
 
 func (wc *replicationWorkerComponent) DedicatedWorkflowWorkerOptions() *workercommon.DedicatedWorkerOptions {

service/worker/worker.go

@@ -98,6 +98,9 @@ func (wm *workerManager) Start() {
 			// use default worker
 			wc.RegisterActivities(defaultWorker)
 		} else {
+			// TODO: This is to prevent issues during upgrade/downgrade. Remove in 1.24 release.
+			wc.RegisterActivities(defaultWorker)
+
 			// this worker component requires a dedicated worker for activities
 			activityWorkerOptions.Options.DisableWorkflowWorker = true
 			activityWorker := wm.sdkClientFactory.NewWorker(sdkClient, activityWorkerOptions.TaskQueue, activityWorkerOptions.Options)