### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When starting the transcription job in response job object is null:

<img width="1154" alt="Screenshot 2023-04-03 at 09 21 09" src="https://user-images.githubusercontent.com/454412/229447066-1671f811-da49-478d-bf24-252f30b17699.png">


### Expected Behavior

Response from the real AWS stack - job object is not null

<img width="1161" alt="Screenshot 2023-04-03 at 09 30 13" src="https://user-images.githubusercontent.com/454412/229441498-06125248-3b68-4679-8204-0163e8245db6.png">


### How are you starting LocalStack?

Custom (please describe below)

### Steps To Reproduce

Using test containers, reproducing project can be found here:

https://github.com/kkocel/local-stack-transcribe-repro

### Environment

```markdown
- OS: macOS
- LocalStack: latest
```


### Anything else?

_No response_
self,
        context: RequestContext,
        status: TranscriptionJobStatus = None,
        job_name_contains: TranscriptionJobName = None,
        next_token: NextToken = None,
        max_results: MaxResults = None,
    ) -> ListTranscriptionJobsResponse:
        store = transcribe_stores[context.account_id][context.region]
        summaries = []
        for job in store.transcription_jobs.values():
            summaries.append(
                TranscriptionJobSummary(
                    TranscriptionJobName=job["TranscriptionJobName"],
                    LanguageCode=job["LanguageCode"],
                    CreationTime=job["CreationTime"],
                    StartTime=job["StartTime"],
                    TranscriptionJobStatus=job["TranscriptionJobStatus"],
                    CompletionTime=job.get("CompletionTime"),
                    FailureReason=job.get("FailureReason"),
                )
            )
        return ListTranscriptionJobsResponse(TranscriptionJobSummaries=summaries)
    def delete_transcription_job(