add ubuntu-24.04 as a testing platform #1131

Job	Run time
test_distros_bundled (amazonlinux:2022)	15m 56s
test_asan	18m 55s
test_distros_shared (ubuntu:20.04)	3m 45s
bundled_gdal_coverage	5m 8s
test_distros_shared (ubuntu:22.04)	3m 47s
test_distros_shared (ubuntu:24.04)	4m 43s
test_mac (16.x)	10m 35s
test_mac_debug	9m 17s
test_distros_shared (debian:bullseye)	3m 35s
test_mac (18.x)	8m 2s
test_node (16, shared)	1m 6s
test_distros_shared (fedora:37)	5m 13s
test_mac (20.x)	8m 6s
test_node (16, bundled)	1m 6s
test_distros_shared (centos:stream9)	4m 22s
test_mac (22.x)	6m 51s
test_node (18, shared)	1s
test_win (16.x)	20m 14s
test_node (18, bundled)	1s
test_win (18.x)	19m 17s
test_node (20, shared)	1s
test_win (20.x)	20m 51s
test_win_debug	21m 6s
test_node (20, bundled)	1s
test_win (22.x)	21m 40s
test_node (22, shared)	1s
test_node (22, bundled)	1s
	3h 33m 41s

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