### 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.
Bucket: BucketName
    ExpectedBucketOwner: Optional[AccountId]
class GetObjectAclOutput(TypedDict, total=False):
    Owner: Optional[Owner]
    Grants: Optional[Grants]
    RequestCharged: Optional[RequestCharged]
class GetObjectAclRequest(ServiceRequest):
    Bucket: BucketName
    Key: ObjectKey
    VersionId: Optional[ObjectVersionId]
    RequestPayer: Optional[RequestPayer]
    ExpectedBucketOwner: Optional[AccountId]
class ObjectPart(TypedDict, total=False):
    PartNumber: Optional[PartNumber]
    Size: Optional[Size]
    ChecksumCRC32: Optional[ChecksumCRC32]
    ChecksumCRC32C: Optional[ChecksumCRC32C]
    ChecksumSHA1: Optional[ChecksumSHA1]
    ChecksumSHA256: Optional[ChecksumSHA256]
PartsList = List[ObjectPart]
class GetObjectAttributesParts(TypedDict, total=False):
    TotalPartsCount: Optional[PartsCount]
    PartNumberMarker: Optional[PartNumberMarker]
    NextPartNumberMarker: Optional[NextPartNumberMarker]
    MaxParts: Optional[MaxParts]
    IsTruncated: Optional[IsTruncated]
    Parts: Optional[PartsList]
class GetObjectAttributesOutput(TypedDict, total=False):