Update access to _get_ndarray_c_version

Also removes special case for old unsupported numpy 1.16

Author: ricardoV94

pytensor/link/c/basic.py

@@ -1371,8 +1371,8 @@ def cmodule_key_(
 
         # We must always add the numpy ABI version here as
         # DynamicModule always add the include <numpy/arrayobject.h>
-        if np.lib.NumpyVersion(np.__version__) < "1.16.0a":
-            ndarray_c_version = np.core.multiarray._get_ndarray_c_version()
+        if np.lib.NumpyVersion(np.__version__) >= "2.0.0rc":
+            ndarray_c_version = np._core._multiarray_umath._get_ndarray_c_version()
         else:
             ndarray_c_version = np.core._multiarray_umath._get_ndarray_c_version()
         sig.append(f"NPY_ABI_VERSION=0x{ndarray_c_version:X}")