Fix terraform_remote_state backend version check

The change recently introduced to ensure that remote backend users do
not accidentally upgrade their state file needs to be disabled for all
read-only uses, including the builtin terraform_remote_state data
source.

builtin/providers/terraform/data_source_state.go

@@ -5,6 +5,7 @@ import (
 	"log"
 
 	"github.com/hashicorp/terraform/backend"
+	"github.com/hashicorp/terraform/backend/remote"
 	"github.com/hashicorp/terraform/configs/configschema"
 	"github.com/hashicorp/terraform/providers"
 	"github.com/hashicorp/terraform/tfdiags"
@@ -233,6 +234,12 @@ func getBackend(cfg cty.Value) (backend.Backend, cty.Value, tfdiags.Diagnostics)
 		return nil, cty.NilVal, diags
 	}
 
+	// If this is the enhanced remote backend, we want to disable the version
+	// check, because this is a read-only operation
+	if rb, ok := b.(*remote.Remote); ok {
+		rb.IgnoreVersionConflict()
+	}
+
 	return b, newVal, diags
 }