google-chrome: add /run/opengl-driver/share/vulkan/icd.d/ to path

NixOS stores ICDs at /run/opengl-driver/share/vulkan/icd.d/. Because
Chrome ships its own vulkan-loader and doesn't use the NixOS system
vulkan-loader, Chrome won't search the /run/opengl-driver directory
withou either adding it to the path or patching Chrome's libvulkan.so.1.

This change adds "${addOpenGLRunpath.driverLink}/share" unconditionally
to the path. addOpenGLRunpath is the same module that NixOS system
vulkan-loader uses as the path.

Tested by running `VK_LOADER_DEBUG=all google-chrome-unstable
--enable-features=Vulkan` and verifying Vulkan is enabled with
chrome://gpu.

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

@@ -44,7 +44,7 @@
 , libvaSupport ? true, libva
 
 # For Vulkan support (--enable-features=Vulkan)
-, vulkanSupport ? true, vulkan-loader
+, addOpenGLRunpath
 }:
 
 with lib;
@@ -70,7 +70,6 @@ let
     libxkbcommon pipewire wayland
   ] ++ optional pulseSupport libpulseaudio
     ++ optional libvaSupport libva
-    ++ optional vulkanSupport vulkan-loader
     ++ [ gtk3 ];
 
   suffix = if channel != "stable" then "-" + channel else "";
@@ -143,7 +142,7 @@ in stdenv.mkDerivation {
     makeWrapper "$out/share/google/$appname/google-$appname" "$exe" \
       --prefix LD_LIBRARY_PATH : "$rpath" \
       --prefix PATH            : "$binpath" \
-      --prefix XDG_DATA_DIRS   : "$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH" \
+      --prefix XDG_DATA_DIRS   : "$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH:${addOpenGLRunpath.driverLink}/share" \
       --add-flags ${escapeShellArg commandLineArgs}
 
     for elf in $out/share/google/$appname/{chrome,chrome-sandbox,${crashpadHandlerBinary},nacl_helper}; do