### 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_
self, inv_context: InvocationContext, invocation_result: InvocationResult
    ) -> InvocationResult:
        """Loop through the list of plugins, and apply their post-processing logic to the Lambda invocation result."""
        for plugin in LambdaExecutorPlugin.get_plugins():
            if not plugin.should_apply(inv_context):
                continue
            invocation_result = plugin.process_result(inv_context, invocation_result)
        return invocation_result
class ContainerInfo:
    """Contains basic information about a docker container."""
    def __init__(self, name, entry_point):
        self.name = name
        self.entry_point = entry_point
@dataclasses.dataclass
class LambdaContainerConfiguration(ContainerConfiguration):