feat(registry-scanner): Add flag to enable mem profile dumps on a PVC

[airadier]

What this PR does / why we need it:

registry-scanner has a new environment variable to write a memory profile (heap dump) periodically to a folder.

This version bumps the registry-scanner to 0.2.56 to include that functionality and adds an option to specify a PVC. When that option is set, the PVC is mounted, mem profile enabled, and the dumps will be written to the PVC

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.

[github-actions]

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