google-chrome-{beta,dev}: fix icons (#95389)

The icon naming scheme for Chrome Beta/Dev has changed from
`product_logo_{res}.png` to `product_logo_{res}_{branch}.png`.

pkgs/applications/networking/browsers/google-chrome/default.nix

@@ -119,9 +119,13 @@ in stdenv.mkDerivation {
       --replace /opt $out/share \
       --replace $out/share/google/$appname/google-$appname $exe
 
-    for icon_file in $out/share/google/chrome*/product_logo_*[0-9].png; do
+    for icon_file in $out/share/google/chrome*/product_logo_[0-9]*.png; do
       num_and_suffix="''${icon_file##*logo_}"
-      icon_size="''${num_and_suffix%.*}"
+      if [ $dist = "stable" ]; then
+        icon_size="''${num_and_suffix%.*}"
+      else
+        icon_size="''${num_and_suffix%_*}"
+      fi
       logo_output_prefix="$out/share/icons/hicolor"
       logo_output_path="$logo_output_prefix/''${icon_size}x''${icon_size}/apps"
       mkdir -p "$logo_output_path"