feat: Add WAF Security PS Rule Config

[jtracey93]

Description

Add WAF Security PS Rule Config as agreed, defined below:

1. New PSRule custom baseline with explicit rules added based on WAF security work, prioritizing top 20 resources
2. Run of PSRule with Azure.Pillar.Security in "audit only" mode (continue_on_error = true)

Pipeline Reference

Pipeline
- Note failure is not due to changes and is in different job
- failing as rule is not passing as expected
- failing as expected
- Note failure is not due to changes and is in different job

Type of Change

• Update to CI Environment or utilities (Non-module affecting changes)
• Azure Verified Module updates:
  • Bugfix containing backwards-compatible bug fixes, and I have NOT bumped the MAJOR or MINOR version in version.json:
    • Someone has opened a bug report issue, and I have included "Closes #{bug_report_issue_number}" in the PR description.
    • The bug was found by the module author, and no one has opened an issue to report it yet.
  • Feature update backwards compatible feature updates, and I have bumped the MINOR version in version.json.
  • Breaking changes and I have bumped the MAJOR version in version.json.
  • Update to documentation

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• I have run Set-AVMModule locally to generate the supporting module files.
• My corresponding pipelines / checks run clean and green without any errors or warnings