bug#57051: 29.0.50; No bold faces on macOS

[Gerd Möllmann]

In GNU Emacs 29.0.50 (build 1, aarch64-apple-darwin21.6.0, NS appkit-2113.60 
Version 12.5 (Build 21G72))
 of 2022-08-07 built on Mini.fritz.box
Repository revision: c8833ba365b8476271b64fbd985d1cf7b1a9ad02
Repository branch: master
Windowing system distributor 'Apple', version 10.3.2113
System Description:  macOS 12.5

With emacs -Q, changing a faces's :weight has no effect.  Here is what
describe-face says about the default face, in case it matters.

           Family: Monaco
          Foundry: nil
            Width: normal
           Height: 120
           Weight: regular
            Slant: normal
       Foreground: Black
DistantForeground: unspecified
       Background: White
        Underline: nil
         Overline: nil
   Strike-through: nil
              Box: nil
          Inverse: nil
          Stipple: nil
             Font: #<font-object 
-*-Monaco-regular-normal-normal-*-12-*-*-*-m-0-iso10646-1>
          Fontset: -*-Monaco-regular-normal-normal-*-*-*-*-*-m-0-fontset-startup
           Extend: nil
          Inherit: nil