feat: Tweaks for reduced nanopb stack usage. #7667

Job	Run time
get-changed-files	10s
get-grouped-hardware	12s
core-coverage	8s
nightly	0s
board-changes	0s
compile-matrix	3s
build (nice_nano_v2, [{"shield":"corne_left"},{"shield":"corne_right"},{"shield":"romac"},{"shiel...	7m 41s
build (nrfmicro_13, [{"shield":"corne_left"},{"shield":"corne_right"},{"shield":"romac"},{"shield...	4m 39s
build (proton_c, [{"shield":"corne_left"},{"shield":"corne_right"},{"shield":"romac"},{"shield":"...	3m 42s
build (bdn9_rev2, [{},{"cmake-args":"-DCONFIG_ZMK_STUDIO=y","snippet":"studio-rpc-usb-uart","nick...	3m 4s
build (nice60, [{}])	3m 7s
build (seeeduino_xiao_ble, [{"shield":"hummingbird"}])	2m 46s
build (nrf52840_m2, [{"shield":"m60"}])	3m 5s
build (planck_rev6, [{}])	3m 5s
build (sparkfun_pro_micro_rp2040, [{"shield":"reviung41","cmake-args":"-DSNIPPET='zmk-usb-logging...	2m 51s
build (nice_nano, [{"shield":"romac_plus","cmake-args":"-DCONFIG_ZMK_RGB_UNDERGLOW=y -DCONFIG_WS2...	3m 1s
build (seeeduino_xiao, [{"shield":"hummingbird","cmake-args":"-DCONFIG_ZMK_STUDIO=y","snippet":"s...	2m 50s
	40m 24s

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