Integrate meta-guf-distro/convert_overrides

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Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-distro/-/commit/fd0e7c679d52ddcbc062882c6708e79fc1fbc0c8

kirkstone: Remove gcc bbappend

Since honister and gcc11 it seems not necessary to include the
"Fix-argument-list-too-long-error.patch" anymore.
Remove the patch and the bbappend as well.

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Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-distro/-/commit/76a406052dee70328bfefdeb496ef24024c6c588

dhclient: Remove dhcp bbappend

With commit https://cgit.openembedded.org/openembedded-core/commit/meta/recipes-connectivity/dhcp?id=7e3357892f204788162747e907d68f857118cf42
dhcp was removed inf favor of dhcpd. Resemble this removal.

Currently, we do not have a replacement configured.

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Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-distro/-/commit/d9392b73132c4ba4d07e144022d4a86ca0c8c387

recipes: Fixed wrong OVERRIDES

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Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-distro/-/commit/800a672d4d1c5e792699c3674ad8b91a8048a3d7

layer: Updated layer.conf to Kirkstone

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Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-distro/-/commit/cd4ba05befde3d34f5d8c1c2c5999acb9014b2e1

overrides: Auto conversion of OVERRIDES

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Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-distro/-/commit/1bb78a833afa9268299772811214e1a391f27b80

ci: Switched to Kirkstone CI/CD