This commit uses the new .. zephyr:code-sample-category directive to
categorize code samples across the tree.
Updates existing legacy references to manually defined targets to now
use :zephyr:code-sample-category: role instead.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
all the external modules related samples are part of samples/modules,
whereas lz4 is in parent. move it to sample/modules/compression/lz4
Signed-off-by: Parthiban Nallathambi <parthiban@linumiz.com>