### 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.
ChecksumSHA256: Optional[ChecksumSHA256]
    MissingMeta: Optional[MissingMeta]
    VersionId: Optional[ObjectVersionId]
    CacheControl: Optional[CacheControl]
    ContentDisposition: Optional[ContentDisposition]
    ContentEncoding: Optional[ContentEncoding]
    ContentLanguage: Optional[ContentLanguage]
    ContentRange: Optional[ContentRange]
    ContentType: Optional[ContentType]
    Expires: Optional[Expires]
    WebsiteRedirectLocation: Optional[WebsiteRedirectLocation]
    ServerSideEncryption: Optional[ServerSideEncryption]
    Metadata: Optional[Metadata]
    SSECustomerAlgorithm: Optional[SSECustomerAlgorithm]
    SSECustomerKeyMD5: Optional[SSECustomerKeyMD5]
    SSEKMSKeyId: Optional[SSEKMSKeyId]
    BucketKeyEnabled: Optional[BucketKeyEnabled]
    StorageClass: Optional[StorageClass]
    RequestCharged: Optional[RequestCharged]
    ReplicationStatus: Optional[ReplicationStatus]
    PartsCount: Optional[PartsCount]
    TagCount: Optional[TagCount]
    ObjectLockMode: Optional[ObjectLockMode]
    ObjectLockRetainUntilDate: Optional[ObjectLockRetainUntilDate]
    ObjectLockLegalHoldStatus: Optional[ObjectLockLegalHoldStatus]
    StatusCode: Optional[GetObjectResponseStatusCode]
ResponseExpires = datetime
IfUnmodifiedSince = datetime
IfModifiedSince = datetime
class GetObjectRequest(ServiceRequest):