fix KLayout install being skipped on Ubuntu 24.04

The apt fallback for Ubuntu >= 23.04 was silently installing whatever
version Ubuntu ships (0.28.16) rather than the pinned 0.30.7 .deb from
klayout.org. On 24.04 VMs where klayout was already present via apt,
every setup.sh run reported "already the newest version" and skipped
the update entirely.

Drop the apt fallback so 24.04 uses the same versioned .deb download
and checksum verification path as 20.04 and 22.04. Non-LTS versions
(23.04, 23.10) now fail fast with a clear message pointing to supported
LTS releases.

Signed-off-by: Joao Luis Sombrio <sombrio@sombrasoft.dev>

Author: sombraSoft

etc/DependencyInstaller.sh

@@ -199,8 +199,6 @@ _installUbuntuPackages() {
     # install KLayout
     if  [[ $1 == "rodete" ]]; then
         apt-get -y install --no-install-recommends klayout python3-pandas
-    elif _versionCompare "$1" -ge 23.04; then
-        apt-get -y install --no-install-recommends klayout python3-pandas
     else
         arch=$(uname -m)
         lastDir="$(pwd)"
@@ -227,7 +225,7 @@ _installUbuntuPackages() {
             elif [[ $1 == 24.04 ]]; then
                 klayoutChecksum=145adaa044101bb41179aa63ec6d7f86
             else
-                echo "Unrecognized version of Ubuntu $1. Please install KLayout manually"
+                echo "Unsupported Ubuntu version $1. Supported versions: 20.04, 22.04, 24.04. Please upgrade to a supported LTS release or install KLayout ${klayoutVersion} manually from https://www.klayout.org/build.html"
                 exit 1
             fi
             wget https://www.klayout.org/downloads/Ubuntu-${1%.*}/klayout_${klayoutVersion}-1_amd64.deb