extra/gen_rodata_ld: Add gen_rodata_ld tool. #705

Job	Run time
Build and package cores	9m 1s
Split off zephyr_main	7s
Split off zephyr_contrib	13s
Split off zephyr	8s
Split off zephyr_unoq	6s
Test zephyr_main:portentac33	2m 39s
Test zephyr_main:opta	2m 27s
Test zephyr_contrib:ek_ra8d1	2m 37s
Test zephyr_main:giga	2m 30s
Test zephyr_main:niclasense	2m 30s
Test zephyr_main:nano33ble	2m 35s
Test zephyr_contrib:frdm_mcxn947	1m 47s
Test zephyr:unoq	2m 24s
Test zephyr_main:portentah7	2m 37s
Test zephyr_contrib:frdm_rw612	2m 21s
Collect logs	7s
Publish jsons	18s
verify-core	0s
Publish core	0s
cleanup-artifacts	3s
	34m 30s

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