fix(images/base): work around broken packagekit on armv7

images/base/git-core-ubuntu-ppa-noble.sources

@@ -0,0 +1,34 @@
+Types: deb
+URIs: https://ppa.launchpadcontent.net/git-core/ppa/ubuntu/
+Suites: noble
+Components: main
+Signed-By: 
+ -----BEGIN PGP PUBLIC KEY BLOCK-----
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images/base/ubuntu.Dockerfile

@@ -30,16 +30,25 @@ RUN apt-get update && \
     pipx \
     python3 \
     python3-pip \
-    software-properties-common \
+# software-properties-common \
     sudo \
     systemd \
     systemd-sysv \
     unzip \
     vim \
     wget \
-    rsync && \
+    rsync
+
+# Compat: on non-armv7 architectures, install `software-properties-common`
+RUN [[ "$(dpkg --print-architecture)" != "armhf" ]] && apt-get install --yes software-properties-common || echo "WARN: Skipping software-properties-common installation on armhf"
+
 # Install latest Git using their official PPA
-    add-apt-repository ppa:git-core/ppa && \
+# Note: due to a dependency issue with the armv7 `software-properties-common` package,
+# we can't use `add-apt-repository` here. Instead, we'll add the Git PPA
+# manually. TODO: remove this workaround when the issue is resolved.
+# Ref: https://bugs.launchpad.net/cloud-images/+bug/2091619
+COPY git-core-ubuntu-ppa-noble.sources /etc/apt/sources.list.d/git-core-ubuntu-ppa-noble.sources
+RUN apt-get update && \
     apt-get install --yes git \
     && rm -rf /var/lib/apt/lists/*