drop Node.js 14 as a rebuild target #948

Job	Run time
test_distros_bundled (amazonlinux:2022)	14m 35s
bundled_gdal_coverage	4m 26s
test_asan	4m 46s
test_distros_shared (ubuntu:22.04)	4m 32s
test_distros_shared (ubuntu:20.04)	4m 41s
test_distros_shared (debian:bullseye)	4m 33s
test_mac_debug	9m 7s
test_distros_shared (fedora:37)	6m 25s
test_mac (14.x)	7m 49s
test_node (14, shared)	5m 53s
test_distros_shared (centos:stream8)	6m 42s
test_mac (16.x)	7m 44s
test_node (14, bundled)	8m 0s
test_mac (18.x)	7m 49s
test_node (16, shared)	5m 34s
test_mac (20.x)	8m 15s
test_win (14.x)	18m 7s
test_node (16, bundled)	4m 58s
test_win (16.x)	16m 47s
test_node (18, shared)	5m 55s
test_win_debug	15m 39s
test_win (18.x)	19m 3s
test_node (18, bundled)	4m 58s
test_win (20.x)	18m 58s
test_node (20, shared)	5m 31s
test_node (20, bundled)	4m 41s
	3h 45m 28s

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