Build and test with PY2.7 #1414

Job	Run time
Build and test with Python 2.7	46s
Build and test cmake:clang:asan	53s
Build and test cmake:qemu-arm-neon-gcc	2m 53s
Build and test cmake:clang-old	40s
Build and test cmake-win64:msvc-rel	47s
Build and test cmake:clang:tsan	57s
Build and test cmake:clang:ubsan	56s
Build and test cmake:gcc-old	37s
Build and test cmake-osx:clang	27s
Build and test cmake-osx:gcc	29s
Build and test python3.10-win	44s
Build and test python3.10:clang	1m 54s
Build and test bazel-osx:root	1m 14s
Build and test fuzz:clang	52s
Build and test cmake-win64:msvc-dbg	43s
Build and test bazel:root	1m 8s
Build and test bazel:java	2m 7s
Build and test bazel-osx:research	1m 5s
Build and test bazel-osx:go	2m 1s
Build and test maven	44s
Build and test bazel:go	1m 12s
Build and test bazel-win:root	1m 34s
Build and test bazel-win:research	1m 33s
Build and test bazel-osx:java	2m 18s
Build and test bazel:research	1m 20s
	29m 54s

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