Support Autoscaling/consumption based ACR Tasks for Internal ACR's

**What is the problem you're trying to solve**
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
When using ACR with 'publicNetworkAccess: disabled' and deploying a dedicated agentpool with BYO subnet, i need to statically provision "count" which will be very expensive and also odd since the rest of my CI infrastructure is consumption based (container app jobs, scale sets, etc)

**Describe the solution you'd like**
Would be good to just be able to set either
a) autoscaling profile on acr tasks, e.g min 1, max 3. this way i can support dynamic parallel jobs and a more demand based billing/usuage.
b) pure consumption based internal acr task agentpool. if this is possible it would be the best option, however i understand its a hard ask since it needs to be attached to my subnet and stay private.

The issue mentions no repository files, tests, or entry points. Start by understanding how private ACR Tasks agent pools with BYO subnets are provisioned, then clarify which autoscaling or consumption model is supported and what completion criteria would apply.

Written by the indexing model from the issue text.