fix: remove malformed test_formatting.tf causing CI failures

[lgallard]

Summary

Remove the test_formatting.tf file with intentionally malformed HCL syntax that has been causing terraform validation failures across all CI workflows.

Problem

The test_formatting.tf file contains invalid Terraform syntax:

resource "aws_kms_key" "backup"{description="Test KMS key"
 
 # Inconsistent indentation and spacing
deletion_window_in_days=7}

This malformed syntax prevents:

• terraform init from running successfully
• terraform validate from completing
• All terraform-related CI checks from passing in any PR

Impact

• ❌ All terraform validation workflows fail
• ❌ PR fix: resolve terraform validation errors found by pre-commit workflow #205 cannot pass CI checks
• ❌ Any terraform operations in CI are blocked

Solution

• ✅ Remove the malformed file completely
• ✅ File is already excluded via .gitignore patterns in PR fix: resolve terraform validation errors found by pre-commit workflow #205
• ✅ This will unblock all terraform CI workflows

Related

• Fixes CI failures reported in PR fix: resolve terraform validation errors found by pre-commit workflow #205
• Works together with .gitignore patterns added in PR fix: resolve terraform validation errors found by pre-commit workflow #205 to prevent recurrence

Test Plan

• Remove malformed test_formatting.tf file
• Verify terraform init/validate works after merge
• Confirm PR fix: resolve terraform validation errors found by pre-commit workflow #205 CI checks pass after this merge