Issue #25188: Add a -P/--pgo flag to regrtest to silence error output.
Since PGO building doesn't care about test failures, silence them when running the test suite for performance reasons. Initial patch by Alecsandru Patrascu of Intel.
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Brett Cannon committed
be7c1638e2bc837125efc18b7e9853caa7dc95bf
Parent: 8214a7c