meta-agl-ros2: Support for ros2 minimal & ydlidar

meta-agl-ros2: Support for ros2 minimal & ydlidar

v1 : Added support for ros2 in AGL and ydlidar driver support by creation of recipes for ydlidar driver and sdk and packagegroup-agl-ros2-minimal & packagegroup-agl-ros2-ydlidar. Concurrently, created a feature template to allow for BBLAYERS and local conf dependencies.

v2 : Removed ALLOW_EMPTY_${PN} = "1" and trailing whitespaces. Set AGL_META_PYTHON = "${METADIR}/external/meta-openembedded/meta-python" otherwise multiple layers might include meta-python and bitbake will choke if a folder is present twice.

v3 : Removed trailing whitespaces. Removed AGL_META_PYTHON, just set it.

v4 : Rebased

v5 : Converted to new syntax: RDEPENDS:${PN}, do_install:append(), IMAGE_INSTALL:append

v6 : Added ${METADIR}/meta-agl-devel/meta-agl-ros2 to bblayers
configuration.

v7 : Added meta-ros-backports-hardknott layer.

v8 : Added packagegroup-agl-ros-native-qt5 to remove dependency to
agl-demo.

Signed-off-by: Shankho Boron Ghosh <shankhoghosh123@gmail.com>
Change-Id: If169fde42e3f51571e2776adc574b7f8437a61fa