PollWorkflowUpdate does not use a context aware data converter

[Quinn-With-Two-Ns]

Expected Behavior

PollWorkflowUpdate does use a context aware data converter.

Actual Behavior

PollWorkflowUpdate does not use a context aware data converter.

sdk-go/internal/internal_workflow_client.go

Line 1900 in 54e131e

return newEncodedValue(v.Success, w.client.dataConverter), nil