Controller vibration not working in HTML5

### Tested versions

4.3 and earlier

### System information

Windows / OSX, Chrome

### Issue description

Input.start_joy_vibration() does nothing in HTML exports.

May be related to #73446 .

### Steps to reproduce

Export a game to HTML5 that runs Input.start_joy_vibration() and upload it to a webserver. No vibration.

### Minimal reproduction project (MRP)

N/A

Start by reproducing the issue with Input.start_joy_vibration() in an HTML5 export served from a webserver, using Chrome on Windows or macOS as described. Read the discussion in issue #73446 for related context. Done means controller vibration works in the HTML5 export without regressing other platforms.

Written by the indexing model from the issue text.