### 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_
return str(self.__dict__)
def eval_log_type(env_var_name):
    """get the log type from environment variable"""
    ls_log = os.environ.get(env_var_name, "").lower().strip()
    return ls_log if ls_log in LOG_LEVELS else False
def is_env_true(env_var_name):
    """Whether the given environment variable has a truthy value."""
    return os.environ.get(env_var_name, "").lower().strip() in TRUE_STRINGS
def is_env_not_false(env_var_name):
    """Whether the given environment variable is empty or has a truthy value."""
    return os.environ.get(env_var_name, "").lower().strip() not in FALSE_STRINGS
def load_environment(profile: str = None):
    """Loads the environment variables from ~/.localstack/{profile}.env
    :param profile: the profile to load (defaults to "default")
    """
    if not profile:
        profile = "default"
    path = os.path.join(CONFIG_DIR, f"{profile}.env")
    if not os.path.exists(path):
        return
    import dotenv
    dotenv.load_dotenv(path, override=False)
def is_linux():