Template test pipeline handling of terraform tests

[danieljurek]

Terraform tests in the template testing pipeline currently fail because there's no easy way to ensure that the az CLI is logged in properly inside the DevContainer context.

Possible approaches include:

• Add exclusion regex to the matrix generation script and pass that configuration down from templates that call it
• Changes to azd template list to exclude certain templates (terraform in this case)... probably not a good idea
• Hardcoding the exclusion into matrix generation (someone would have to go read the matrix generation script to understand the intent there and would be surprised to find this special case hardcoded in)

Original discussion: #4522 (comment)

[rajeshkamal5050]

@danieljurek @ellismg is there an option to just run the terraform ones non-DevContainer based? Given that we are trying to validate for terraform integration with azd hasn't regressed?