### 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,
        id: MetricsId,
        expected_bucket_owner: AccountId = None,
    ) -> GetBucketMetricsConfigurationOutput:
        raise NotImplementedError
    @handler("GetBucketNotification")
    def get_bucket_notification(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> NotificationConfigurationDeprecated:
        raise NotImplementedError
    @handler("GetBucketNotificationConfiguration")
    def get_bucket_notification_configuration(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> NotificationConfiguration:
        raise NotImplementedError
    @handler("GetBucketOwnershipControls")
    def get_bucket_ownership_controls(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketOwnershipControlsOutput:
        raise NotImplementedError
    @handler("GetBucketPolicy")
    def get_bucket_policy(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketPolicyOutput:
        raise NotImplementedError
    @handler("GetBucketPolicyStatus")
    def get_bucket_policy_status(