test: fallback to IPv4 if IPv6 is unavailable

openssl seems to default to use IPv6. This change adds a check if IPv6 is unavailable and uses IPv4 instead. On the Node.js CI IBM i build system IPv6 is currently disabled. This change should resolve the following test case failures:

• https://ci.nodejs.org/job/node-test-commit-ibmi/nodes=ibmi73-ppc64/1085/testReport/(root)/test/sequential_test_tls_psk_client_/

• https://ci.nodejs.org/job/node-test-commit-ibmi/nodes=ibmi73-ppc64/1085/testReport/(root)/test/sequential_test_tls_securepair_client_/

CC

@nodejs/platform-ibmi @richardlau