### 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_
cleanup_fns = []
    yield cleanup_fns
    for cleanup_callback in cleanup_fns[::-1]:
        try:
            cleanup_callback()
        except Exception as e:
            LOG.warning("Failed to execute cleanup", exc_info=e)
@pytest.fixture(scope="session")
def account_id():
    sts_client = _client("sts")
    return sts_client.get_caller_identity()["Account"]
@pytest.hookimpl
def pytest_configure(config: Config):
    
    config.addinivalue_line(
        "markers",
        "only_localstack: mark the test as incompatible with AWS / can't be run with AWS_CLOUD target",
    )
@pytest.hookimpl
def pytest_collection_modifyitems(config: Config, items: list[Item]):
    only_localstack = pytest.mark.skipif(
        os.environ.get("TEST_TARGET") == "AWS_CLOUD",
        reason="test only applicable if run against localstack",
    )
    for item in items:
        if "only_localstack" in item.keywords:
            item.add_marker(only_localstack)
@pytest.fixture
def sample_stores() -> AccountRegionBundle:
    class SampleStore(BaseStore):