Fix byte-compilation warnings in nox builds

Fix byte-compilation warnings in nox builds

For discussion, see bug#51139.

* lisp/edmacro.el (edmacro-fix-menu-commands): Load mwheel to pacify
free variable warnings in without-x builds.

* lisp/mh-e/mh-compat.el: Declare image.el functions that are not
preloaded in without-x builds.
* lisp/mh-e/mh-utils.el (mh--with-image-load-path): New macro.
(mh-logo-display):
* lisp/mh-e/mh-tool-bar.el (mh-tool-bar-folder-buttons-init)
(mh-tool-bar-letter-buttons-init): Use it to pacify byte-compilation
warnings about image.el definitions not preloaded without-x.