### 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_
"$..HostId",
            "$..VersionId",
            "$..HTTPHeaders.content-type",
            "$..HTTPHeaders.last-modified",
            "$..HTTPHeaders.location",
            "$..MaxAttemptsReached",
        ],
    )
    def test_put_and_get__with_content_language_disposition(
        self, s3_client, s3_bucket, snapshot
    ):
        snapshot.add_transformer(snapshot.transform.s3_api())
        snapshot.add_transformer(HEADER_TRANSFORMER)
        response = s3_client.put_(
            Bucket=s3_bucket,
            Key="test",
            Body=b"abc123",
            ContentLanguage="de",
            ContentDisposition='attachment; filename="foo.jpg"',
            CacheControl="no-cache",
        )
        assert response["ResponseMetadata"]["HTTPStatusCode"] == 200
        snapshot.match("put-", response)
        snapshot.match("put--headers", response["ResponseMetadata"])
        response = s3_client.get_(Bucket=s3_bucket, Key="test")
        snapshot.match("get-", response)
        snapshot.match("get--headers", response["ResponseMetadata"])
        assert response["Body"].read() == b"abc123"
    @pytest.mark.aws_validated
    def test_resource__with_slashes_in_key(self, s3_resource, s3_bucket):