files/group: add render group with static ID for new systemd

files/group: add render group with static ID for new systemd

Yocto Project 4.0.6 now comes with systemd v236, which uses render group:

https://git.openembedded.org/openembedded-core/commit/?h=kirkstone&id=f902338f312cf5c55b2857e5c7e980cb11a26a9c
https://git.openembedded.org/openembedded-core/commit/?h=kirkstone&id=ba1db7f9189526b02e3d75d375ece53953c2e942

Bug-AGL: SPEC-4668

Change-Id: I473644f4b9e57663f036b43a48a8319e4d664d65
Signed-off-by: Denys Dmytriyenko <denys@konsulko.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/28369
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>