misc: Optimize flash and memory usage. #778

Job	Run time
Build and package cores	9m 6s
Split off zephyr	17s
Split off zephyr_main	8s
Split off zephyr_contrib	15s
Split off zephyr_unoq	8s
Test zephyr_main:nano33ble	1m 59s
Test zephyr:unoq	2m 25s
Test zephyr_main:opta	2m 29s
Test zephyr_main:niclasense	1m 54s
Test zephyr_contrib:frdm_rw612	3m 25s
Test zephyr_main:giga	1m 55s
Test zephyr_contrib:frdm_mcxn947	1m 41s
Test zephyr_main:portentac33	1m 56s
Test zephyr_main:portentah7	2m 37s
Test zephyr_contrib:ek_ra8d1	2m 25s
Collect logs	6s
Publish jsons	15s
verify-core	0s
Publish core	0s
cleanup-artifacts	5s
	33m 6s

Provide feedback