(PIE-1363) Parameter name changes and removals

[coreymbe]

Summary

In preparation for v2 of this module, this commit removes the deprecated reports parameter, renames the collect_facts parameter, and adds two new parameters for event forwarding credentials.

Detailed Description

• manifests/init.pp
  • Added token_events and url_events parameters for event forwarding.
  • Removed deprecated reports parameter.
  • Renamed collect_facts -> facts_allowlist.
• files/hec_secrets.yaml.epp
  • Added event token to template.
• templates/settings.yaml.epp
  • Added event url to template.
• templates/util_splunk_hec.erb
  • Renamed custom source_type for event forwarding.
• lib/puppet/indirector/facts/splunk_hec.rb
  • Removed comment regarding collect_facts parameter name.
• spec/classes/init_spec.rb
  • Removed unit test against deprecated reports parameter.
• Updated README.md
• Updated REFERENCE.md
• Updated CHANGELOG.md
• Maintenance:
  • manifests/init.pp - Ensure sensitivate data is redacted from logs.

Checklist

[X] Ensure README is updated
[X] Any changes to existing documentation
[X] Anything new added
[X] Unit Tests
[ ] Acceptance Tests
[X] PR title is "(Ticket|Maint) Short Description"
[X] Commit title matches PR title

[actowery]

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