Palo Alto Prisma Cloud: Implement mappings for Cloud Security Workflows

[kcreddy]

Implement mappings as per meta: 15058 and CDR guide

[elasticmachine]

Pinging @elastic/security-service-integrations (Team:Security-Service Integrations)

[kcreddy]

Working on draft PR: #16012 for adding 2 new data streams. Permissions are added into elastic/elasticsearch#138218, which need to be tested on live data. We have the credentials.