Add stable-rc v6.9 CI support

Issue description

Add stable-rc v6.9 CI support

Useful links

• https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci
• https://gitlab.com/cip-project/cip-kernel/cip-kernel-config
• https://gitlab.com/cip-project/cip-testing/linux-cip-pipelines