misc: Optimize flash and memory usage. #805

Job	Run time
Build and package cores	11m 30s
Split off zephyr	8s
Split off zephyr_contrib	14s
Split off zephyr_main	7s
Split off zephyr_unoq	15s
Test zephyr_main:giga	2m 34s
Test zephyr_main:niclasense	2m 32s
Test zephyr_main:portentah7	2m 28s
Test zephyr_main:opta	2m 26s
Test zephyr_main:nano33ble	2m 35s
Test zephyr_main:portentac33	2m 32s
Test zephyr_contrib:ek_ra8d1	2m 26s
Test zephyr_contrib:frdm_mcxn947	1m 45s
Test zephyr_contrib:frdm_rw612	2m 22s
Test zephyr:unoq	2m 23s
verify-core	0s
Publish core	0s
Collect logs	6s
Publish jsons	22s
cleanup-artifacts	6s
	36m 51s

Provide feedback