fix(run_unit_tests)_: don't exit in nightly runs (#5808)

_assets/scripts/run_unit_tests.sh

@@ -127,6 +127,9 @@ else
   wait
 fi
 
+# When running in PRs (count=1), early exit if any test failed.
+# When running nightly (count>1), generate test stats ant coverage reports anyway.
+if [[ $UNIT_TEST_COUNT -eq 1 ]]; then
   for exit_code_file in "${GIT_ROOT}"/exit_code_*.txt; do
     read exit_code < "${exit_code_file}"
     if [[ "${exit_code}" -ne 0 ]]; then
@@ -134,6 +137,7 @@ for exit_code_file in "${GIT_ROOT}"/exit_code_*.txt; do
       exit ${exit_code}
     fi
   done
+fi
 
 # Gather test coverage results
 merged_coverage_report="coverage_merged.out"