Convert python_test's module-info.json to soong

This causes the python launcher's shared libs to no longer be listed
under the "required" field, but that seems to not be necessary to
still run python tests with atest.

Bug: 389720048
Test: atest vts_vndk_dependency_test
Change-Id: I7eb96af18aeb550530799431c8bacceb581f66c2