Honor `--quiet` parameter properly in fish shell (#77180)

* The `^` stderr redirection is deprecated
* Setting `-q` for `setup.py` in `gen_egg_info` is redundant

changelogs/fragments/77180-fix-fish-env-setup-script.yml

@@ -0,0 +1,3 @@
+bugfixes:
+  - hacking - fix incorrect usage of deprecated fish-shell redirection operators
+    that failed to honor ``--quiet`` flag when sourced (https://github.com/ansible/ansible/pull/77180).

hacking/env-setup.fish

@@ -80,20 +80,15 @@ function gen_egg_info
         rm -rf $PREFIX_PYTHONPATH/ansible*.egg-info
     end
 
-    if [ $QUIET ]
+    eval $PYTHON_BIN setup.py egg_info
-        set options '-q'
-    end
-
-    eval $PYTHON_BIN setup.py $options egg_info
-
 end
 
 
 pushd $ANSIBLE_HOME
 
 if [ $QUIET ]
-    gen_egg_info ^ /dev/null
+    gen_egg_info &> /dev/null
-    find . -type f -name "*.pyc" -exec rm -f '{}' ';' ^ /dev/null
+    find . -type f -name "*.pyc" -exec rm -f '{}' ';' &> /dev/null
 else
     gen_egg_info
     find . -type f -name "*.pyc" -exec rm -f '{}' ';'