Start migration off defaults to conda-forge channel (#4126)

Summary: Pull Request resolved: #4126

Differential Revision: D68043874

Author: Michael Norris

.github/actions/build_cmake/action.yml

@@ -24,6 +24,8 @@ runs:
       with:
         python-version: '3.11'
         miniconda-version: latest
+        channels: conda-forge
+        conda-remove-defaults: "true"
     - name: Configure build environment
       shell: bash
       run: |

.github/actions/build_conda/action.yml

@@ -31,6 +31,8 @@ runs:
       with:
         python-version: '3.11'
         miniconda-version:  latest
+        channels: conda-forge
+        conda-remove-defaults: "true"
     - name: Install conda build tools
       shell: ${{ steps.choose_shell.outputs.shell }}
       run: |