Use debhelper tools for dependency compilation and packaging

[robin-reckmann]

Use debhelper tools for creation of the .deb packages rather than old checkinstall.

[github-actions]

✅ AGNOS update 11-6a809ba ready

In an openpilot branch, download agnos.json in system/hardware/tici/ and update AGNOS_VERSION to "11-6a809ba" in launch_env.sh.

For flashing locally, download and unarchive the images in agnos-builder/output and flash with ./flash_all.sh.

Images:

• boot-85d777b14bb1ecf4f70c230cc229dcfd7e01ec1918438f922f68a25434b88f94.img.xz
• system-cf7d39b508594adeb9c657ccda39aa9db44904784073de4f81ccd9dd41abe54f.img.xz
• system-skip-chunks-cf7d39b508594adeb9c657ccda39aa9db44904784073de4f81ccd9dd41abe54f.img.xz

Stats:

3.7G	/
620M	/usr/local/venv
854M	/usr/lib/aarch64-linux-gnu
338M	/usr/lib/llvm-18
155M	/usr/lib/arm-linux-gnueabihf
328M	/usr/share
286M	/usr/bin
166M	/usr/comma

[andiradulescu]

I will run test_onroad on this, before merge.