Make deploying to demo environment less manual

[derekadombek]

Right now we skip the deploy-frontend step in deploy-dev.yml if demo is used at dispatch and then we run the build-deploy-frontend.yml workflow after by copying/pasting the newly provisioned randomized storage account's name to the dispatch input when triggering the workflow.

We should be able to remove those manual steps by outputting the storage account's name from terraform when its getting created to then use it as a variable in the same github actions run.