Build and test GAM #2868

Job	Run time
build (ubuntu-20.04, 1, build, x86_64, linux-x86_64)	19m 33s
build (self-hosted, linux, arm64, 2, build, aarch64, linux-aarch64)	27m 42s
build (ubuntu-20.04, 3, build, x86_64, linux-x86_64, yes)	19m 25s
build (self-hosted, linux, arm64, 4, build, aarch64, linux-aarch64, yes)	36m 6s
build (macos-12, 5, build, x86_64, darwin64-x86_64)	22m 20s
build (self-hosted, macOS, ARM64, 7, build, aarch64, darwin64-arm64)	24m 15s
build (self-hosted, macOS, ARM64, 12, build, universal2, darwin64-arm64 darwin64-x86_64)	26m 16s
build (windows-2022, 6, build, Win64, VC-WIN64A)	21m 58s
build (ubuntu-22.04, test, 3.8, 9, x86_64)	17m 49s
build (ubuntu-22.04, test, 3.9, 10, x86_64)	15m 59s
build (ubuntu-22.04, test, 3.10, 11, x86_64)	16m 54s
build (ubuntu-22.04, test, 3.11, 12, x86_64)	7m 55s
publish	0s
	4h 16m 12s

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