[ci] Install git globally before anything else; Run pixi info

.gitlab-ci.yml

@@ -38,6 +38,8 @@ default:
       [mirrors]
       "https://conda.anaconda.org/conda-forge" = [ "http://bobconda.lab.idiap.ch:8080/conda-forge" ]
       EOF
+    - pixi info
+    - pixi install git
 
 stages:
   - qa