fix(common,agent,node-analyzer,kspm-collector): support multi-level map in agent.tags

[zohar-arad]

What this PR does / why we need it:

• Support multi-level map in agent.tags helper (for example - role.server.primary:agent, role.server.secondary:scanner)
• Update depending charts - agent,node-analyzer,kspm-collector
• Remove duplicate call to agent.tags helper in agent config map
• Use agent.tags helper in host-scanner config map, instead of rendering tags directly from map

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• 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

Check Contribution guidelines in README.md for more insight.