chore(agent,sysdig-deploy): mount /host/dev volume readonly on ebpf mode

[francesco-furlan]

What this PR does / why we need it:

We want to mount the dev-vol (/host/dev) volume as readonly when eBPF is enabled.

Checklist

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