### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

copyObject and putObject (and perhaps other requests) requests are accepted and do not return an error when an SSE KMS key is specified. 

### Expected Behavior

The error which should be returned is KMS.NotFoundException.

### How are you starting LocalStack?

Custom (please describe below)

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

    Localstack testcontainers 

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

   Call copyObject/putObject via latest version using AWS SDK V2 and specific a ssekmsKeyId.

```java
final var copyObjectRequestBuilder =
        CopyObjectRequest.builder()
            .serverSideEncryption(ServerSideEncryption.AWS_KMS)
            .ssekmsKeyId("NON-EXISTENT KMS KEY")
            .sourceBucket(sourceBucketName)
            .sourceKey(sourceKey)
            .destinationBucket(destinationBucket)
            .destinationKey(destinationKey);
final var copyObjectResponse = sourceRegionS3Client.copyObject(copyObjectRequest); // Error should be thrown here but localstack does not return an error
```

### Environment

```markdown
- OS: MacOS 13.0
- LocalStack: Latest (v1.2.0)
```


### Anything else?

_No response_
website_url = _website_bucket_url(bucket_name)
        # actu
        response = .get(website_url)
        assert response.status_code == 200
        assert response.text == "index"
        s3_client.put_(
            Bucket=bucket_name,
            Key="directory/index.html",
            Body="index",
            ContentType="text/html",
            ACL="public-read",
        )
        response = .get(f"{website_url}/directory", allow_redirects=False)
        assert response.status_code == 302
        assert response.headers["Location"] == "/directory/"
        response = .get(f"{website_url}/directory/", verify=False)
        assert response.status_code == 200
        assert response.text == "index"
        response = .get(f"{website_url}/directory-wrong", verify=False)
        assert response.status_code == 404
        snapshot.match("404-no-trailing-slash", response.text)
        response = .get(f"{website_url}/directory-wrong/", verify=False)
        assert response.status_code == 404
        snapshot.match("404-with-trailing-slash", response.text)
    @pytest.mark.aws_validated
    @pytest.mark.skipif(
        condition=LEGACY_S3_PROVIDER and not is_aws_cloud(),
        reason="Legacy S3 provider does not provide proper website support",
    )
    def test_website_hosting_404(self, s3_client, s3_create_bucket, snapshot):