WindSoilder 182b0ab4fb
add echo_env_mixed testbin to reduce windows only tests (#11172)
# Description
We have seen some test cases which requires to output message to both
stdout and stderr, especially in redirection scenario.

This pr is going to introduce a new echo_env_mixed testbin, so we can
have less tests which only runs on windows.

# User-Facing Changes
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# Tests + Formatting
NaN

# After Submitting
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2023-11-28 06:42:35 -06:00
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