Reland "[GTK] Detect GTK4 IME incompatibilities"

This is a reland of commit 276ae2984b019744196f0b54a234c33b7d7e7517
Reland fixes the non-x11 build.

Cq-Include-Trybots: luci.chromium.try:linux-wayland-rel

Original change's description:
> [GTK] Detect GTK4 IME incompatibilities
>
> Some users have GTK3 input modules for IBus and Fcitx, but are missing
> the corresponding GTK4 modules. This CL aims to detect that case and
> prevent defaulting to GTK4. It also prevents defaulting to GTK4 for IBus
> with Korean locales, since some implementations are known to be buggy.
>
> Change-Id: Ic891836d35219fb07fbb1ede873f11b0f312562b
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6499945
> Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
> Reviewed-by: Orko Garai <orko@igalia.com>
> Cr-Commit-Position: refs/heads/main@{#1454733}

Change-Id: I466c9b1bb96b6e01c097ca4bdfd5cd93aa5498b3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6507359
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Orko Garai <orko@igalia.com>
Reviewed-by: Orko Garai <orko@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1455174}