### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

The use case I have in mind is to run Node 16.x Lambdas - the default container registry is `lambci/lambda` which is effectively abandoned. [Not even Node 14.x has been published](https://github.com/lambci/docker-lambda/pull/330). However, switching the registry over to [`amazon/aws-lambda-nodejs`](https://hub.docker.com/r/amazon/aws-lambda-nodejs) still fails to pull the container, since localstack is looking for the tag `nodejs16.x`. I'd like to be able to specify that if the runtime is `nodejs16.x` it just looks for tag `16`.

### 🧑‍💻 Implementation

_No response_

### Anything else?

_No response_
assert sid == policy["Statement"][0]["Sid"]
        assert lambda_arn == policy["Statement"][0]["Resource"]
        assert principal == policy["Statement"][0]["Principal"]["Service"]
        assert (
            aws_stack.s3_bucket_arn("test-bucket")
            == policy["Statement"][0]["Condition"]["ArnLike"]["AWS:SourceArn"]
        )
        
        
        policies = iam_client.list_policies(Scope="Local", MaxItems=500)["Policies"]
        policy_name = get_lambda_policy_name(function_name)
        matching = [p for p in policies if p["PolicyName"] == policy_name]
        assert len(matching) == 1
        assert ":policy/" in matching[0]["Arn"]
        
        resp = lambda_client.remove_permission(
            FunctionName=function_name,
            StatementId=sid,
            Qualifier="qual1",
            RevisionId="r1",
        )
        assert 200 == resp["ResponseMetadata"]["HTTPStatusCode"]
    @pytest.mark.skip_snapshot_verify
    def test_remove_multi_permissions(self, lambda_client, create_lambda_function, snapshot):
        """Tests creation and subsequent removal of multiple permissions, including the changes in the policy"""
        snapshot.add_transformer(snapshot.transform.lambda_api())
        function_name = f"lambda_func-{short_uid()}"
        create_lambda_function(
            handler_file=TEST_LAMBDA_PYTHON_ECHO,
            func_name=function_name,