`custom-theme-set-faces!` calls `custom-theme-set-faces`, which will
mark the customizations for saving to custom.el. But
`custom-theme-set-faces!` is not intended for permanent customizations.
I fix this by setting `custom--inhibit-theme-enable` to prevent some of
the extra work `custom-theme-set-faces` does around changing faces, and
call face-spec-set manually.
Also renames doom--custome-theme-set-face to doom--normalize-face-space,
to better reflect what it does.
Close: #7929
Co-authored-by: real-or-random <real-or-random@users.noreply.github.com>
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