Add a volume to the PCS Container App, and initialize the VMR on it

[dkurepa]

The Product Construction Service will work with the VMR. We'll need to:

• Add a volume to the Container App Azure resource (and the bicep template)
• Initialize the VMR
• Make sure the readiness health probe waits for the VMR to initialize

[dkurepa]

A 50gb volume has been added to the ContainerApp as a part of #3257. The only remaining part here is to intialize the VMR on it

[dkurepa]

the PR adding this has been merged. We made it so the deployment waits for the PCS to initialize before finishing, using the built in containerapp health probes