### 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.
code: str = "ObjectAlreadyInActiveTierError"
    sender_fault: bool = False
    status_code: int = 400
class ObjectNotInActiveTierError(ServiceException):
    code: str = "ObjectNotInActiveTierError"
    sender_fault: bool = False
    status_code: int = 400
class NoSuchLifecycleConfiguration(ServiceException):
    code: str = "NoSuchLifecycleConfiguration"
    sender_fault: bool = False
    status_code: int = 404
    BucketName: Optional[BucketName]
class InvalidBucketName(ServiceException):
    code: str = "InvalidBucketName"
    sender_fault: bool = False
    status_code: int = 400
    BucketName: Optional[BucketName]
class PreconditionFailed(ServiceException):
    code: str = "PreconditionFailed"
    sender_fault: bool = False
    status_code: int = 412
    Condition: Optional[IfCondition]
ObjectSize = int
class InvalidRange(ServiceException):
    code: str = "InvalidRange"
    sender_fault: bool = False
    status_code: int = 416
    ActualObjectSize: Optional[ObjectSize]
    RangeRequested: Optional[ContentRange]
class InvalidArgument(ServiceException):