Dockerfile: Switch b4 installation to pip for latest version

Removed b4 from apt-get install and added installation via pip using
--break-system-packages option.
This change ensures the latest available version of b4 is used instead
of the older version provided by apt, improving compatibility and
access to recent features.

Signed-off-by: Komal Bajaj <[email protected]>

Author: Komal-Bajaj

Dockerfile

@@ -21,11 +21,12 @@ RUN printf "Types: deb\nURIs: http://archive.ubuntu.com/ubuntu/\nSuites: noble n
     apt-get update && \
     apt-get install -y build-essential git clang-15 lld-15 flex bison bc libssl-dev curl kmod systemd-ukify && \
     apt-get install -y debhelper-compat libdw-dev:amd64 libelf-dev:amd64 && \
-    apt-get install -y rsync mtools dosfstools lavacli u-boot-tools b4 cpio && \
+    apt-get install -y rsync mtools dosfstools lavacli u-boot-tools cpio && \
     apt-get install -y gcc-aarch64-linux-gnu && \
     apt-get install -y python3-pip swig yamllint && \
     apt install -y python3-setuptools python3-wheel && \
     python3 -m pip install --break-system-packages dtschema==2025.08 jinja2 ply GitPython && \
+    python3 -m pip install --break-system-packages b4==0.14.3 && \
     apt-get install -y yq && \
     apt-get install -y abigail-tools sparse && \
     apt-get install -y cmake libyaml-dev && \