Fix CUDA 11.4.4 builds under CircleCI (facebookresearch#3466)

Summary:
Pull Request resolved: facebookresearch#3466

Flattening Conda include directories breaks CUDA 11.4.4 build on Ubuntu 20 / v5 kernel. This change updates the logic to only flatten includes on Ubuntu 22 / v6 kernel (aka as running on GitHub Actions runners).

Reviewed By: algoriddle

Differential Revision: D57602154

fbshipit-source-id: 00c14ca7c64644b8b86483ac6b4d40c6d8f12372

Author: ramilbakhshyiev

.github/workflows/build.yml

@@ -121,6 +121,7 @@ jobs:
     runs-on: 4-core-ubuntu-gpu-t4
     env:
       CUDA_ARCHS: "60-real;61-real;62-real;70-real;72-real;75-real;80;86-real"
+      FAISS_FLATTEN_CONDA_INCLUDES: "1"
     steps:
       - name: Checkout
         uses: actions/checkout@v4

conda/faiss-gpu/meta.yaml

@@ -43,9 +43,7 @@ outputs:
         - {{ pin_compatible('libfaiss', exact=True) }}
       script_env:
         - CUDA_ARCHS
-        {% if cudatoolkit == '11.4.4' %}
-        - FAISS_FLATTEN_CONDA_INCLUDES=1
-        {% endif %}
+        - FAISS_FLATTEN_CONDA_INCLUDES
     requirements:
       build:
         - {{ compiler('cxx') }}