tgc-revival: add tfplan2cai converter (#12770)

Author: zli82016

mmv1/templates/tgc_next/tfplan2cai/resource_converters.go.tmpl

@@ -26,3 +26,10 @@
 //
 // ----------------------------------------------------------------------------
 package converters
+
+import (
+	"github.com/GoogleCloudPlatform/terraform-google-conversion/v6/pkg/tfplan2cai/converters/cai"
+)
+
+var ConverterMap = map[string]cai.ResourceConverter{
+}