providers/terraform: don't call backend.Configure to validate terraform_remote_state
providers/terraform: don't call backend.Configure to validate terraform_remote_state

Validation is supposed to be a local-only operation, but Configure implementations
are allowed to make outgoing requests to remote APIs to validate settings.

pdecat/terraform,pdecat/terraform,hashicorp/terraform,pdecat/terraform,apparentlymart/terraform,rnaveiras/terraform,apparentlymart/terraform,apparentlymart/terraform,ewbankkit/terraform,pryorda/terraform,pryorda/terraform,tommynsong/terraform,VladRassokhin/terraform,tommynsong/terraform,ewbankkit/terraform,rnaveiras/terraform,hashicorp/terraform,tommynsong/terraform,apparentlymart/terraform,VladRassokhin/terraform,rnaveiras/terraform,ewbankkit/terraform,ewbankkit/terraform,VladRassokhin/terraform,apparentlymart/terraform,VladRassokhin/terraform,pdecat/terraform,pryorda/terraform,hashicorp/terraform