Run the test suite against the 2023 version of the standard on CI

Author: asmeurer

.github/workflows/array-api-tests.yml

@@ -74,6 +74,7 @@ jobs:
       if: "! ((matrix.python-version == '3.11' || matrix.python-version == '3.12') && inputs.package-name == 'numpy' && contains(inputs.package-version, '1.21'))"
       env:
         ARRAY_API_TESTS_MODULE: array_api_compat.${{ inputs.module-name || inputs.package-name }}
+        ARRAY_API_TESTS_VERSION: 2023.12
         # This enables the NEP 50 type promotion behavior (without it a lot of
         # tests fail on bad scalar type promotion behavior)
         NPY_PROMOTION_STATE: weak