### 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_
"""Called once, for any active plugin to run initialization logic (e.g., downloading dependencies).
        Uses lazy initialization - i.e., runs only after the first should_apply() call returns True"""
        pass
    def should_apply(self, context: InvocationContext) -> bool:
        """Whether the plugin logic should get applied for the given Lambda invocation context."""
        return False
    def prepare_invocation(
        self, context: InvocationContext
    ) -> Optional[Union[AdditionalInvocationOptions, InvocationResult]]:
        """Return additional invocation options for given Lambda invocation context. Optionally, an
        InvocationResult can be returned, in which case the result is returned to the client right away."""
        return None
    def process_result(
        self, context: InvocationContext, result: InvocationResult
    ) -> InvocationResult:
        """Optionally modify the result returned from the given Lambda invocation."""
        return result
    def init_function_configuration(self, lambda_function: LambdaFunction):
        """Initialize the configuration of the given function upon creation or function update."""
        pass
    def init_function_code(self, lambda_function: LambdaFunction):
        """Initialize the code of the given function upon creation or function update."""
        pass
    @classmethod
    def get_plugins(cls) -> List["LambdaExecutorPlugin"]: