Overview/Summary

Remove WAFv1 stages sections and recommendations. WAF recommendations are now leveraging the current WAF reliability pillar recommendations.

Related Issues/Work Items

[x] Read the Contribution Guide and ensured this PR is compliant with the guide
[x] Checked for duplicate Pull Requests
[x] Associated it with relevant GitHub Issues or ADO Work Items (Internal Only)
[x] Ensured my code/branch is up-to-date with the latest changes in the main branch
[x] Ensured PR tests are passing
[x] Performed testing and provided evidence (e.g. screenshot of output) for any changes associated to ARG queries
[x] Updated relevant and associated documentation (e.g. Contribution Guide, Docs etc.)