feat(infra): Ignoring local Terraform files (#5227)

* feat(infra): Ignoring local Terraform files

* Addressing some comments

Author: justin-tahara

.gitignore

@@ -27,3 +27,13 @@ settings.json
 /deployment/data/nginx/app.conf
 *.sw?
 /backend/tests/regression/answer_quality/search_test_config.yaml
+
+# Local .terraform directories
+**/.terraform/*
+
+# Local .tfstate files
+*.tfstate
+*.tfstate.*
+
+# Local .terraform.lock.hcl file
+.terraform.lock.hcl