Add Terraform equivalence on automatic type conversions

[rc-mattschwager]

Is your feature request related to a problem? Please describe.

Terraform supports automatic type conversions between strings, ints, and bools: https://developer.hashicorp.com/terraform/language/expressions/types#type-conversion. E.g. "42" and 42, "true" and true.

Describe the solution you'd like

It would be helpful if Semgrep automatically supported these type equivalences so I don't have to manually specify separate cases in rules. Here's a link that exhibits the behavior: https://semgrep.dev/playground/s/D0Kj.

Describe alternatives you've considered

Manually specifying the equivalences

Use case
What will this feature enable for you?

Additional context
Add any other context or screenshots about the feature request here.