ci: refactor terraform validation

Author: npalm

.tflint.hcl

@@ -3,26 +3,20 @@ config {
   call_module_type = "local"
 }
 
-plugin "terraform" {
-    enabled = true
-    version = "0.10.0"
-    source  = "github.com/terraform-linters/tflint-ruleset-terraform"
-}
-
 plugin "aws" {
     enabled = true
     version = "0.34.0"
     source  = "github.com/terraform-linters/tflint-ruleset-aws"
 }
 
-# rule "terraform_comment_syntax" {
-#     enabled = true
-# }
+rule "terraform_comment_syntax" {
+    enabled = true
+}
 
-# rule "terraform_naming_convention" {
-#   enabled = true
-# }
+rule "terraform_naming_convention" {
+  enabled = true
+}
 
-# rule "terraform_documented_variables" {
-#   enabled = true
-# }
+rule "terraform_documented_variables" {
+  enabled = true
+}