bug#81589: 31.0.91; Regression: window-buffer-change-functions no longer firing on set-window-configuration

In the latest v31, upon using `set-window-configuration' (e.g. via
`tab-bar-history-back') to change the buffer in a window, the
`window-buffer-change-functions' are not run.  Neither global nor
buffer-local values of this hook are run, in contrast to earlier
versions.

I have verified that this is a recent regression caused by commit d6f7b2d99bd in bug#81097.  With this commit, the hook does not run.  Without it, it does.

Reproducer for the buffer-local case:

emacs -Q
Eval:

        (add-hook 'window-buffer-change-functions
        	  (lambda (frame)
        	    (walk-windows
        	     (lambda (win)
        	       (message "W=%s WOB=%s" win (window-old-buffer win)))
        	     nil frame)) nil t)

M-x tab-bar-history-mode
C-x right  ; *Message* showing, (<win 3 on *Messages*> *scratch*) 
M-x tab-bar-history-back ; *scratch* showing, but hook was not called