(SIMP-9780) Puppetsync: Remove Puppet 5, Support 7

[op-ct]

This patch:

• Removes Puppet 5 from metadata.json and the GHA & GLCI matrix
• Ensures support for Puppet 7 in metadata.json
  • Ensures Pup 7 for module deps stdlib and concat (if present)
• Updates GLCI and GHA matrix to model Puppet PE using Puppet 6.22.1
• Bumps Gemfile's simp-rake-helpers and simp-beaker-helpers min vers
• Removes .pmtignore and adds .pdkignore
• Fixes haveged spec tests for el8 factsets

The patch enforces a standardized asset baseline using simp/puppetsync, and may apply other updates to ensure conformity.

SIMP-9805 #close SIMP-9780 #comment Drop Puppet 5 in pupmod-simp-haveged SIMP-9670 #comment update Puppet 6.22.1 in pupmod-simp-haveged SIMP-9606 #comment Switch pupmod-simp-haveged from .pmtignore to .pdkignore SIMP-9781 #comment bump Gemfile versions in pupmod-simp-haveged SIMP-9813 #close #comment Fix haveged spec tests for el8 factsets