Build git-annex on macOS #2293

Job	Run time
build-package	13m 54s
test-annex-more	30s
test-datalad (maint)	1h 51m 13s
test-annex (normal, macos-15-intel)	9m 17s
test-annex (crippled-tmp, macos-15-intel)	12m 24s
test-annex (normal, macos-latest-large)	1h 35m 53s
test-datalad (master)	1h 52m 28s
test-annex (custom-config1, macos-15-intel)	9m 53s
test-datalad (release)	2h 23m 19s
	8h 28m 51s

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