### 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.
CopySourceVersionId: Optional[CopySourceVersionId]
    CopyPartResult: Optional[CopyPartResult]
    ServerSideEncryption: Optional[ServerSideEncryption]
    SSECustomerAlgorithm: Optional[SSECustomerAlgorithm]
    SSECustomerKeyMD5: Optional[SSECustomerKeyMD5]
    SSEKMSKeyId: Optional[SSEKMSKeyId]
    BucketKeyEnabled: Optional[BucketKeyEnabled]
    RequestCharged: Optional[RequestCharged]
class UploadPartCopyRequest(ServiceRequest):
    Bucket: BucketName
    CopySource: CopySource
    CopySourceIfMatch: Optional[CopySourceIfMatch]
    CopySourceIfModifiedSince: Optional[CopySourceIfModifiedSince]
    CopySourceIfNoneMatch: Optional[CopySourceIfNoneMatch]
    CopySourceIfUnmodifiedSince: Optional[CopySourceIfUnmodifiedSince]
    CopySourceRange: Optional[CopySourceRange]
    Key: ObjectKey
    PartNumber: PartNumber
    UploadId: MultipartUploadId
    SSECustomerAlgorithm: Optional[SSECustomerAlgorithm]
    SSECustomerKey: Optional[SSECustomerKey]
    SSECustomerKeyMD5: Optional[SSECustomerKeyMD5]
    CopySourceSSECustomerAlgorithm: Optional[CopySourceSSECustomerAlgorithm]
    CopySourceSSECustomerKey: Optional[CopySourceSSECustomerKey]
    CopySourceSSECustomerKeyMD5: Optional[CopySourceSSECustomerKeyMD5]
    RequestPayer: Optional[RequestPayer]
    ExpectedBucketOwner: Optional[AccountId]
    ExpectedSourceBucketOwner: Optional[AccountId]
class UploadPartOutput(TypedDict, total=False):