Workflow Sub-Orchestration creation not working

[shivamkm07]

In what area(s)?

/area runtime

/area operator

/area placement

/area docs

/area test-and-release

What version of Dapr?

edge: output of git describe --dirty

Expected Behavior

We should be able to create Child workflow and run it without any errors.

Actual Behavior

When trying to create and run a child workflow, workflow execution simply stalls with workflow never completing, and finally erroring out with Context deadline exceeded.

In Daprd logs, following log can be found:
iowriter.go:89: Test_Integration/daprd/workflow/workflow/daprd: time="2024-01-15T22:18:22.228973448+05:30" level=warning msg="Workflow actor '73550139-539f-443d-a5ce-bcdab2d65832': execution failed with a recoverable error and will be retried later: 'method CreateWorkflowInstance on actor '73550139-539f-443d-a5ce-bcdab2d65832:0000' returned an error: failed to unmarshal createWorkflowInstanceRequest: invalid character '\\b' looking for beginning of value'" app_id=myapp instance=MININT-0A33K9K scope=dapr.wfengine.backend.actors type=log ver=unknown

Steps to Reproduce the Problem

Try to run a workflow that creates a child workflow. It errors out as described above.

Release Note

RELEASE NOTE: