Enable puma in Asha

[Samze]

See green run with this enabled https://concourse.app-runtime-interfaces.ci.cloudfoundry.org/teams/capi-team/pipelines/capi/jobs/asha-mysql-deploy-cf/builds/291#L66cc2aad:2666

Set workers to 2 which is the default # of cpu for small in cf-deployment and bbl cloud config for gcp: see:

• https://github.com/cloudfoundry/cf-deployment/blob/main/cf-deployment.yml#L837
• https://github.com/cloudfoundry/bosh-bootloader/blob/91b260941aa83c41184a383ad85e07d6b0759cfd/cloudconfig/gcp/base_ops_template.go#L78-L83