Created AWS Lambda node

[irynamatveieva]

Pull Request description

Created AWS Lambda node.

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Back-End feature checklist

• Added corresponding unit and/or integration test(s). Provide written explanation in the PR description if you have failed to add tests.
• If new dependency was added: the dependency tree is checked for conflicts.
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• If new REST API was added: the RestClient.java was updated, issue for Python REST client is created.
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We need to replace invocationType from the configuration since we plan to support only the RequestResponse type.

[ShvaykaD]

Rule nodes fields templatization