Updated the macOS CI staging steps (both arm64 and x86_64 jobs) to stage locales under "$STAGE_PREFIX/share/locale/" by creating "$STAGE_PREFIX/share" and syncing from "$BREW_PREFIX/share/locale/" there, instead of using a top-level "$STAGE_PREFIX/locale" directory.

Updated the gtk-mac-bundler bundle translation roots for both gtk30 and zoitechat to ${prefix}/share/locale (from ${prefix}/locale).

osx/zoitechat.bundle

@@ -50,10 +50,10 @@
     ${prefix}/lib/gdk-pixbuf-2.0/${pkg:gdk-pixbuf-2.0:gdk_pixbuf_binary_version}/loaders/*.so
   </binary>
   <translations name="gtk30">
-    ${prefix}/locale
+    ${prefix}/share/locale
   </translations>
   <translations name="zoitechat">
-    ${prefix}/locale
+    ${prefix}/share/locale
   </translations>
 
   <data dest="${bundle}/Contents/Resources">