pin python version for cmake workflows (#7060)

* pin python version for macos cmake

* ping python for all OS

* revert to only set this for macos

* debug

* remove debug

Author: pmeier

.circleci/config.yml

@@ -958,11 +958,6 @@ jobs:
     machine:
       image: ubuntu-2004-cuda-11.4:202110-01
     resource_class: gpu.nvidia.small
-    environment:
-      PYTHON_VERSION: << parameters.python_version >>
-      PYTORCH_VERSION: << parameters.pytorch_version >>
-      UNICODE_ABI: << parameters.unicode_abi >>
-      CU_VERSION: << parameters.cu_version >>
     steps:
       - checkout_merge
       - designate_upload_channel
@@ -986,7 +981,7 @@ jobs:
             curl -o conda.sh https://repo.anaconda.com/miniconda/Miniconda3-latest-MacOSX-x86_64.sh
             sh conda.sh -b
             source $HOME/miniconda3/bin/activate
-            conda install -yq conda-build cmake
+            conda install -yq conda-build cmake python=<< parameters.python_version >>
             packaging/build_cmake.sh
 
   cmake_windows_cpu: