iox-#1030 Speed up posh tests #7587

Job	Run time
pre-flight-check	48s
pre-flight-check	48s
run-integration-test	16m 59s
run-integration-test	11m 22s
build-test-windows	14m 25s
build-test-windows	14m 25s
build-test-ubuntu	15m 54s
build-test-ubuntu	15m 54s
build-test-ubuntu-with-address-sanitizer-clang-latest	11m 16s
build-test-ubuntu-with-address-sanitizer-clang-latest	11m 16s
build-test-ubuntu-with-address-sanitizer-gcc-latest	17m 8s
build-test-ubuntu-with-address-sanitizer-gcc-latest	17m 8s
build-test-unix-with-freebsd	22m 15s
build-test-unix-with-freebsd	22m 15s
build-test-macos-with-address-sanitizer	11m 6s
build-test-macos-with-address-sanitizer	11m 6s
build-test-ubuntu-bazel	17m 48s
build-test-ubuntu-bazel	17m 48s
build-test-ubuntu-with-gcc5	10m 40s
build-test-ubuntu-with-gcc5	10m 40s
build-test-ubuntu-with-thread-sanitizer-clang-latest	11m 19s
build-test-ubuntu-with-thread-sanitizer-clang-latest	11m 19s
coverage-and-docs	13m 7s
coverage-and-docs	12m 59s
	5h 19m 45s

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