Add Posix tests for sockets #15418

Job	Run time
evergreen-arm64 / initialize	47s
evergreen-arm-hardfp / initialize	48s
evergreen-arm-softfp / initialize	45s
evergreen-x64 / initialize	42s
evergreen-x64 / docker-build-image	2m 28s
evergreen-x64 / docker-unittest-image	1m 14s
evergreen-arm-softfp / docker-unittest-image	0s
evergreen-arm-softfp / docker-build-image	2m 21s
evergreen-arm64 / docker-build-image	2m 17s
evergreen-arm64 / docker-unittest-image	0s
evergreen-arm-hardfp / docker-build-image	2m 15s
evergreen-arm-hardfp / docker-unittest-image	0s
evergreen-x64 / x64_devel	9s
evergreen-x64 / x64_debug	10s
evergreen-x64 / x64_qa	9s
evergreen-x64 / x64_gold	10s
evergreen-x64 / sbversion-17_devel	9s
evergreen-x64 / sbversion-17_debug	8s
evergreen-x64 / sbversion-17_qa	9s
evergreen-x64 / sbversion-17_gold	9s
evergreen-arm-softfp / ${{ matrix.name }}_${{ matrix.config }}	1s
evergreen-arm64 / ${{ matrix.name }}_${{ matrix.config }}	1s
evergreen-arm-hardfp / ${{ matrix.name }}_${{ matrix.config }}	1s
evergreen-x64 / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
evergreen-x64 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
evergreen-arm64 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
evergreen-arm64 / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
evergreen-arm-hardfp / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
evergreen-arm-hardfp / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
evergreen-arm-softfp / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
evergreen-arm-softfp / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
	15m 1s

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