feat(agent): add support for Windows Agent

[iurly]

What this PR does / why we need it:

This is draft/WIP PR to add support for the Windows Agent Please note:

• The structure of the new values is open for discussion
• the access key is currently added to the configmap (dragent.yaml) to allow testing, pending changes to the agent's code (see SSPROD-39123). THIS CHANGE SHOULD NOT BE MERGED
• as of today, the image published on quay does not work out of the box, so a specially crafted image should be specified through custom values.yaml

Checklist

• [x] Title of the PR starts with type and scope, (e.g. feat(agent,node-analyzer,sysdig-deploy):)
• [ ] Chart Version bumped for the respective charts
• [x] 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