only run full test suite for one python version when in emulation

recipe/meta.yaml

@@ -401,7 +401,12 @@ outputs:
         {% set tests_to_skip = tests_to_skip + " or test_total_bytes_allocated " %}       # [linux]
         {% set tests_to_skip = tests_to_skip + " or test_feather_format " %}              # [linux]
         # ^^^^^^^ TESTS THAT SHOULDN'T HAVE TO BE SKIPPED ^^^^^^^
+        {% if not (aarch64 or ppc64le) or py == 311 %}
+        # only run the full test suite for one python version when in emulation (each run takes ~45min);
+        # there's essentially zero divergence in behaviour across python versions anyway, and otherwise
+        # CUDA builds for aarch/ppc consistently would run out of disk space on azure for some reason
         - pytest -rfEs -k "not ({{ tests_to_skip }})"
+        {% endif %}
 
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