fix: add gitignore patterns for test formatting files

Add .gitignore patterns to prevent test files with intentional formatting issues from being committed and causing CI failures.

This addresses the terraform validation errors in CI workflows where malformed test_formatting.tf files were causing terraform init and validate to fail.

Author: lgallard

.gitignore

@@ -37,3 +37,9 @@ terraform.rc
 
 # Cursor rules
 .cursor/rules/*
+
+# Test files with intentional formatting issues
+test_formatting.tf
+*test_formatting.tf
+*_test.tf
+test_*.tf