Implement necessary changes in Anaconda to enabled Encrypted DNS functionality.

Description:
The %certificate section has been introduced in Kickstart (added in Fedora 42) to allow the installation of custom certificates during system setup. This feature is critical for validating TLS certificates of DNS servers.

Scope of Testing:

• Verify the %certificate section works as expected in Kickstart configurations.
• Ensure custom certificates are correctly installed in the specified directory.
• Validate that the feature handles different use cases, including valid and invalid certificates, file paths, and directory inputs.
• Ensure backward compatibility