Add Debian_12_update repo for testing with typer

Even though we will add support for the typer Cli with kiwi-11
I want our integration test images to be able to build with the
open PR #2751. Debian 12 is the only target in the support matrix
which uses a too old veryion of typer. Therefore to be able to
test this target I built a newer version of typer in an update
repo for Debian 12 and added it to the integration test
description

Author: schaefi

build-tests/x86/debian/.repos

@@ -1,3 +1,4 @@
+obs://Virtualization:Appliances:Staging/Debian_12_update,apt-deb,kiwi,,,,,,,false
 obs://Virtualization:Appliances:Staging/Debian_12_x86_64,apt-deb,kiwi,,,,,,,false
 https://ftp.halifax.rwth-aachen.de/debian,apt-deb,bookworm_1,,,,,main,bookworm,false
 https://ftp.halifax.rwth-aachen.de/debian,apt-deb,bookworm_2,,,,,contrib,bookworm,false

build-tests/x86/debian/test-image-live-disk/appliance.kiwi

@@ -51,6 +51,9 @@
     <users>
         <user password="$1$wYJUgpM5$RXMMeASDc035eX.NbYWFl0" home="/root" name="root" groups="root"/>
     </users>
+    <repository type="apt-deb" repository_gpgcheck="false" architectures="amd64">
+        <source path="obs://Virtualization:Appliances:Staging/Debian_12_update"/>
+    </repository>
     <repository type="apt-deb" repository_gpgcheck="false" architectures="amd64">
         <source path="obs://Virtualization:Appliances:Staging/Debian_12_x86_64"/>
     </repository>