Disable Cachix pushes

This is not safe until we have sandboxed builds. For TGI alone
this might not be a huge issue, but with Cachix caching disabled
in hf-nix, TGI CI would build all the packages and push it to
our cache.

Author: danieldk

.github/workflows/nix_build.yaml

@@ -23,7 +23,7 @@ jobs:
       with:
         name: huggingface
         # If you chose signing key for write access
-        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+        # authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
       env:
         USER: github_runner
     - name: Build

.github/workflows/nix_cache.yaml

@@ -22,7 +22,7 @@ jobs:
         with:
           name: huggingface
           # If you chose signing key for write access
-          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+          #authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
         env:
           USER: github_runner
       - name: Build impure devshell

.github/workflows/nix_tests.yaml

@@ -27,9 +27,11 @@ jobs:
       with:
         name: huggingface
         # If you chose signing key for write access
-        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+        #authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
       env:
         USER: github_runner
+    - name: Nix info
+      run: nix-shell -p nix-info --run "nix-info -m"
     - name: Build
       run: nix develop .#test --command echo "Ok"
     - name: Pre-commit tests.