Move Leo specific strings to Brave grdp. (#20410)

As the string is not overriding any Chromium strings, we should use our
own grdp. Previously, the auto generated file is touched manually,
and broke rebase pipeline.

components/omnibox/browser/leo_provider.cc

@@ -9,10 +9,10 @@
 
 #include "brave/components/ai_chat/common/features.h"
 #include "brave/components/omnibox/browser/leo_action.h"
+#include "components/grit/brave_components_strings.h"
 #include "components/omnibox/browser/autocomplete_input.h"
 #include "components/omnibox/browser/autocomplete_match.h"
 #include "components/omnibox/browser/autocomplete_provider_client.h"
-#include "components/strings/grit/components_strings.h"
 #include "third_party/metrics_proto/omnibox_input_type.pb.h"
 #include "third_party/omnibox_proto/types.pb.h"
 #include "ui/base/l10n/l10n_util.h"

components/omnibox_strings.grdp

@@ -287,8 +287,4 @@
   <message name="IDS_OMNIBOX_ONE_LINE_CALCULATOR_SUGGESTION_TEMPLATE" desc="The string displayed when a calculator answer is suggested.">
     <ph name="EXPRESSION">$1</ph> = <ph name="ANSWER">$2</ph>
   </message>
-
-  <message name="IDS_OMNIBOX_ASK_LEO_DESCRIPTION" desc="The label in the omnibox explaning that the match item will open Leo">
-    Ask Leo
-  </message>
 </grit-part>

components/resources/omnibox_strings.grdp

@@ -11,4 +11,7 @@
     Open here button, press Enter to open this url in the current tab, instead of switching to the
     existing tab
   </message>
+  <message name="IDS_OMNIBOX_ASK_LEO_DESCRIPTION" desc="The label in the omnibox explaning that the match item will open Leo">
+    Ask Leo
+  </message>
 </grit-part>