test: unset NODE_OPTIONS for cctest

The test may fail otherwise because of behaviour changes caused
by setting the environment variable.

Fixes: #31585

PR-URL: #31594
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

test/cctest/node_test_fixture.h

@@ -70,6 +70,7 @@ class NodeZeroIsolateTestFixture : public ::testing::Test {
 
   static void SetUpTestCase() {
     if (!node_initialized) {
+      uv_os_unsetenv("NODE_OPTIONS");
       node_initialized = true;
       int argc = 1;
       const char* argv0 = "cctest";