Add vpatch-CVE-2024-32870 rule and test

[crowdsec-automation]

This rule detects unauthorized access to the iTop Hub Connector's information disclosure endpoint, as described in CVE-2024-32870. The detection logic is as follows:

• It matches requests to /pages/exec.php (case-insensitive, URL-decoded).
• It ensures the exec_module argument equals itop-hub-connector.
• It ensures the exec_page argument equals launch.php.
• It ensures the target argument equals inform_after_setup.
  This combination of URI and argument values uniquely identifies the vulnerable endpoint and prevents false positives from other uses of /pages/exec.php. All value: fields are lowercase, and all relevant transforms (lowercase, urldecode) are applied. The rule uses equals for exact argument matching and contains for the URI, as per best practices. No regex or unnecessary complexity is used, and the rule is optimized for minimal false positives and negatives. The test nuclei template is adapted to expect a 403 response, as required.

Exploit URL: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-32870.yaml