Collect JWT payload data

[dareste]

Proposed changes

The changes introduced here allow the supportpkg to collect entitlement data for N+ deployments via the following workflow:

1. Read the nginx-ingress pod args and collect the value for the argument mgmt-configmap.
2. Read the configmap and collect the value for the key license-token-secret-name.
3. Read the secret and collect the value for the key license.jwt.
4. Decode the payload only (excluding the signature) and save it in the supportpkg.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING guide
• I have proven my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have ensured the README is up to date
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch on my own fork

[mrajagopal]

Ship it.