CI: Add XML and Dockerfile for FHI7.2 gNB with T2 support

Use taskset with a dynamic range based on the number of detected processors
for OAI and DPDK build. This ensures both DPDK and OAI build steps use all
available CPU cores on the machine.

Build with XRAN K release

Signed-off-by: Jaroslava Fiedlerova <jaroslava.fiedlerova@openairinterface.org>

docker/Dockerfile.build.fhi72.t2.ubuntu

@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: LicenseRef-CSSL-1.0
+
+#---------------------------------------------------------------------
+#
+# Dockerfile for the Open-Air-Interface RAN Build for FHI 7.2
+#               Valid for UBUNTU 24.04
+#
+#---------------------------------------------------------------------
+
+FROM ran-base:latest AS ran-base
+
+ARG xran_VERSION=11.1.1
+ARG DPDK_VERSION=22.11
+ARG T2_PATCH=AMD-T2-SDFEC_25-03-1.patch
+ENV DEBIAN_FRONTEND=noninteractive
+ENV TZ=Europe
+RUN apt-get update && \
+    apt-get upgrade --yes && \
+    apt-get install --yes \
+        meson \
+        wget \
+        xz-utils \
+        pkg-config \
+	python3-pyelftools \
+        libnuma-dev && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN rm -Rf /oai-ran
+WORKDIR /oai-ran
+COPY . .
+## Copy T2 patch
+COPY ./$T2_PATCH /opt/.
+## Download and build DPDK
+RUN wget http://fast.dpdk.org/rel/dpdk-$DPDK_VERSION.tar.xz && \
+    tar -xvf dpdk-$DPDK_VERSION.tar.xz && \
+    cd dpdk-$DPDK_VERSION && \
+    patch -p1 < /opt/$T2_PATCH && \
+    meson build && \
+    taskset -c 0-$(grep ^processor /proc/cpuinfo | wc -l) ninja -C build && \
+    ninja install -C build
+
+## Build Fronthaul library
+RUN git clone https://github.com/openairinterface/o-du-phy.git /opt/phy && \
+    cd /opt/phy && \
+    git checkout $xran_VERSION &&\
+    cd /opt/phy/fhi_lib/lib && \
+    WIRELESS_SDK_TOOLCHAIN=gcc RTE_SDK=/oai-ran/dpdk-$DPDK_VERSION/ XRAN_DIR=/opt/phy/fhi_lib make XRAN_LIB_SO=1
+
+FROM ran-base AS ran-build-fhi72-t2
+## Build and install OAI
+## Run build_oai to build the target image, if T2 patch present, build with T2 support
+RUN /bin/sh oaienv && \ 
+    taskset -c 0-$(grep ^processor /proc/cpuinfo | wc -l) \
+    cmake -B build/ -GNinja -DOAI_FHI72=ON \
+          -Dxran_LOCATION=/opt/phy/fhi_lib/lib \
+          -DENABLE_LDPC_AAL=ON && \
+    ninja -C build/