### 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_
file_in_container = self.provide_file_to_lambda(file_path, inv_context)
                file_keys_map[key] = file_in_container
            
            for key, file_path in file_keys_map.items():
                for env_key, env_value in inv_options.env_updates.items():
                    inv_options.env_updates[env_key] = str(env_value).replace(
                        "{%s}" % key, file_path
                    )
                if inv_options.updated_command:
                    inv_options.updated_command = inv_options.updated_command.replace(
                        "{%s}" % key, file_path
                    )
                    inv_context.lambda_command = inv_options.updated_command
            
            inv_context.environment.update(inv_options.env_updates)
            
            if inv_options.updated_handler:
                inv_context.handler = inv_options.updated_handler
        if invocation_results:
            
            
            
            if len(invocation_results) > 1:
                LOG.warning(
                    "Multiple invocation results returned from "
                    "LambdaExecutorPlugin.prepare_invocation calls - choosing the first one: %s",
                    invocation_results,
                )
            return invocation_results[0]
    def process_result_via_plugins(