Support for Language Version 2 in ARM templates

[JohnathonMohr]

Description

Support new features introduced in language version 2. (Closes #388, #390, #391)

• Support resources with symbolic names in addition to array format
• Improvements to nested template discovery
• Update Bicep and Deployments core packages
• Fix VS Code launch profiles

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Testing Guidelines

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[reynoldskr]

Nothing blocking

[anaismiller]

I remember last time, there was a file you missed updating for the release. Just verifying, did you update that file? (for a future enhancement, whatever that file was, you can add it to the PR checklist)