### 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.
self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketPolicyStatusOutput:
        raise NotImplementedError
    @handler("GetBucketReplication")
    def get_bucket_replication(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketReplicationOutput:
        raise NotImplementedError
    @handler("GetBucketRequestPayment")
    def get_bucket_request_payment(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketRequestPaymentOutput:
        raise NotImplementedError
    @handler("GetBucketTagging")
    def get_bucket_tagging(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketTaggingOutput:
        raise NotImplementedError
    @handler("GetBucketVersioning")
    def get_bucket_versioning(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketVersioningOutput:
        raise NotImplementedError
    @handler("GetBucketWebsite")
    def get_bucket_website(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketWebsiteOutput:
        raise NotImplementedError
    @handler("GetObject")
    def get_object(