Set LOCAL_DISABLE_AUTO_GENERATE_TEST_CONFIG on sh_test

If auto_generate_test_config is false. Without this line, soong is not
autogenerating a test config, but make still is. And the
make-autogenerated test config file is invalid, it has a
{EXTRA_TEST_RUNNER_CONFIGS} placeholder in it that's only replaced
in soong code, not make code.

Bug: 388850000
Test: m device-tests
Change-Id: I8b2686fa68996d58ef4f5769047ff9ec418eaca5