use macos-12 to test the npm package #1150

Job	Run time
bundled_gdal_coverage	5m 29s
test_asan	3m 57s
test_distros_bundled (amazonlinux:2022)	15m 55s
test_distros_shared (ubuntu:20.04)	1s
test_mac (16.x)	6m 20s
test_distros_shared (ubuntu:22.04)	1m 33s
test_mac (18.x)	6m 15s
test_mac_debug	10m 9s
test_distros_shared (ubuntu:24.04)	1s
test_node (16, shared)	3m 47s
test_mac (20.x)	5m 46s
test_distros_shared (debian:bullseye)	1m 44s
test_node (16, bundled)	3m 55s
test_mac (22.x)	6m 23s
test_distros_shared (fedora:37)	1m 33s
test_node (18, shared)	3m 52s
test_distros_shared (centos:stream9)	1m 25s
test_node (18, bundled)	3m 56s
test_node (20, shared)	3m 57s
test_node (20, bundled)	3m 57s
test_win (16.x)	18m 17s
test_node (22, shared)	3m 49s
test_win_debug	17m 50s
test_win (18.x)	18m 57s
test_node (22, bundled)	3m 53s
test_win (20.x)	21m 36s
test_win (22.x)	19m 9s
	3h 13m 26s

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