Some tests fail when valgrind is enabled

[jafingerhut]

That is, when this line https://github.com/p4lang/PI/blob/main/tests/CLI/Makefile.am#L7

enables the tests by having this content:

AM_TESTS_ENVIRONMENT = export PI_TEST_WITH_VALGRIND=1;

The tests pass when valgrind is disabled, i.e. when the line above has this content instead:

AM_TESTS_ENVIRONMENT = unset PI_TEST_WITH_VALGRIND;