Add service monitor to Alloy/values.yaml

Package Merge Request

Package Changes

Enable the service monitors for alloy as well as configure the tls config with scheme=https through the postrenderers since the upstream override charts don't allow changes to scheme without affecting inter-deployment traffic since it isn't configured for istio peer istio convoy.

Package MR

N/A

For Issue

Closes big-bang/product/packages/alloy#83 (closed)

Upgrade Notices

N/A