core: Fix thread section alignment. #645

Job	Run time
Build and package cores	8m 51s
Split off zephyr	8s
Split off zephyr_unoq	14s
Split off zephyr_contrib	14s
Split off zephyr_main	8s
Test zephyr_main:portentah7	2m 48s
Test zephyr_main:niclasense	2m 42s
Test zephyr_main:portentac33	2m 42s
Test zephyr_main:nano33ble	2m 44s
Test zephyr_main:giga	2m 52s
Test zephyr:unoq	2m 32s
Test zephyr_contrib:frdm_rw612	2m 41s
Test zephyr_contrib:frdm_mcxn947	2m 34s
Test zephyr_contrib:ek_ra8d1	2m 33s
Test zephyr_main:opta	2m 51s
Collect logs	6s
Publish jsons	16s
verify-core	-1s
Publish core	-1s
cleanup-artifacts	5s
	36m 59s

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