refactor(android,ios,web): Move globe hint implementation from mobile platforms into Web

[darcywong00]

          `createKeyTip` and `startLongpress` should be removed from `EmbeddedGestureConfig`.

I also think that the globe hint should be reimplemented in KeymanWeb, so we don't need any of this glue, and so it can be themed later. (This can be a separate pull)

Originally posted by @mcdurdin in #9591 (comment)

Relates to #9573

[jahorton]

Since the description is lacking...

As far as I can tell, the globe hint still exists on both Android and iOS - this wasn't removed by #9591. It's that we wish to redo it, removing it from mobile-platform-native code and placing it entirely in Web, rather than need to maintain the specialized cross-WebView pattern longterm.