Legacy WAF-Rule sets

Number of APIs: 3

1. Generate WAF ruleset VCL GET {{fastly_url}}/service/{{service_id}}/wafs/{{firewall_id}}/ruleset/preview

2. Get a WAF ruleset GET {{fastly_url}}/service/{{service_id}}/wafs/{{firewall_id}}/ruleset

3. Update a WAF ruleset PATCH {{fastly_url}}/service/{{service_id}}/wafs/{{firewall_id}}/ruleset