Fix 32-bit CI build

Operating System
  Ubuntu
  24.04.1
  LTS
Runner Image
  Image: ubuntu-24.04
  Version: 20250105.1.0
  Included Software: https://github.com/actions/runner-images/blob/ubuntu24/20250105.1/images/ubuntu/Ubuntu2404-Readme.md
  Image Release: https://github.com/actions/runner-images/releases/tag/ubuntu24%2F20250105.1

Removing libibus-1.0-dev:i386 and libimlib2-dev:i386 from the 32-bit
build fixes this error:-

The following packages have unmet dependencies:
 shim-signed : Depends: grub-efi-amd64-signed (>= 1.191~) but it is not going to be installed or
                        grub-efi-arm64-signed (>= 1.191~) but it is not installable or
                        base-files (< 12.3)
               Depends: grub-efi-amd64-signed (>= 1.187.2~) but it is not going to be installed or
                        grub-efi-arm64-signed (>= 1.187.2~) but it is not installable
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

This is somewhat difficult to comprehend, as the following packages are
installed:-

base-files                         13ubuntu10.1
grub-efi-amd64-signed              1.202+2.12-1ubuntu7
shim-signed                        1.58+15.8-0ubuntu1

scripts/install_xrdp_build_dependencies_with_apt.sh

@@ -116,15 +116,15 @@ in
         # build support tool.
         # - Ubuntu 18.04 -> 20.04
         #       Removed fdk-aac-dev:i386 and libfuse-dev:i386
+        # - Ubuntu 24.04.1
+        #       Removed libibus-1.0-dev:i386 and libimlib2-dev:i386
         PACKAGES="$PACKAGES \
             g++-multilib \
             gcc-multilib \
             $LIBFREETYPE_DEV:i386 \
             libgl1-mesa-dev:i386 \
             libglu1-mesa-dev:i386 \
-            libibus-1.0-dev:i386 \
             libjpeg-dev:i386 \
-            libimlib2-dev:i386 \
             libmp3lame-dev:i386 \
             libopus-dev:i386 \
             libpam0g-dev:i386 \