chore(shield): add support to rapid_response and response_actions features

[francesco-furlan]

What this PR does / why we need it:

• Let customers specify rapid_response and response_actions settings on the features.respond section;
• We support: features.respond, features.responding (just for rapid_response) or host.additional_settings.

Checklist

• Title of the PR starts with type and scope, (e.g. feat(agent,node-analyzer,sysdig-deploy):)
• Chart Version bumped for the respective charts
• Variables are documented in the README.md (or README.tpl in some charts)
• Check GithubAction checks (like lint) to avoid merge-check stoppers
• All test files are added in the tests folder of their respective chart and have a "_test" suffix