### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

The Complete Multipart Upload operation generates the **InternalError** error for non-existing uploads.

### Expected Behavior

The Complete Multipart Upload operation generates the **NoSuchUpload** error for non-existing uploads.

### How are you starting LocalStack?

With a `docker run` command

### Steps To Reproduce

    docker run -it --rm -p 4566:4566 localstack/localstack

    aws s3api create-bucket --bucket test --endpoint-url http://localhost:4566 --create-bucket-configuration LocationConstraint=us-west-2

    aws s3api complete-multipart-upload --bucket test --endpoint-url http://localhost:4566 --key test --upload-id test

### Environment

```markdown
- OS: Windows 11
- LocalStack: latest
```


### Anything else?

The Abort Multipart Upload operation works correctly in LocalStack.

The official documentation: https://docs.aws.amazon.com/AmazonS3/latest/API/API_CompleteMultipartUpload.html
Amazon S3 throws the correct **NoSuchUpload** error for both Abort and Complete operations.
Key: Optional[ObjectKey]
    VersionId: Optional[ObjectVersionId]
    DeleteMarker: Optional[DeleteMarker]
    DeleteMarkerVersionId: Optional[DeleteMarkerVersionId]
DeletedObjects = List[DeletedObject]
class DeleteObjectsOutput(TypedDict, total=False):
    Deleted: Optional[DeletedObjects]
    RequestCharged: Optional[RequestCharged]
    Errors: Optional[Errors]
class DeleteObjectsRequest(ServiceRequest):
    Bucket: BucketName
    Delete: Delete
    MFA: Optional[MFA]
    RequestPayer: Optional[RequestPayer]
    BypassGovernanceRetention: Optional[BypassGovernanceRetention]
    ExpectedBucketOwner: Optional[AccountId]
    ChecksumAlgorithm: Optional[ChecksumAlgorithm]
class DeletePublicAccessBlockRequest(ServiceRequest):
    Bucket: BucketName
    ExpectedBucketOwner: Optional[AccountId]
class ReplicationTimeValue(TypedDict, total=False):
    Minutes: Optional[Minutes]
class Metrics(TypedDict, total=False):
    Status: MetricsStatus
    EventThreshold: Optional[ReplicationTimeValue]
class ReplicationTime(TypedDict, total=False):