Container file for fhi 7.2 build

- Updating gcc version in the base image to 12
- Updating base image to ubuntu jammy

docker/Dockerfile.base.ubuntu20

-#/*
-# * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
-# * contributor license agreements.  See the NOTICE file distributed with
-# * this work for additional information regarding copyright ownership.
-# * The OpenAirInterface Software Alliance licenses this file to You under
-# * the OAI Public License, Version 1.1  (the "License"); you may not use this file
-# * except in compliance with the License.
-# * You may obtain a copy of the License at
-# *
-# *      http://www.openairinterface.org/?page_id=698
-# *
-# * Unless required by applicable law or agreed to in writing, software
-# * distributed under the License is distributed on an "AS IS" BASIS,
-# * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# * See the License for the specific language governing permissions and
-# * limitations under the License.
-# *-------------------------------------------------------------------------------
-# * For more information about the OpenAirInterface (OAI) Software Alliance:
-# *      contact@openairinterface.org
-# */
-#---------------------------------------------------------------------
-#
-# Dockerfile for the Open-Air-Interface BUILD service
-#   Valid for Ubuntu 20.04
-#
-#---------------------------------------------------------------------
-
-
-FROM ubuntu:focal AS ran-base
-ARG NEEDED_GIT_PROXY
-ENV DEBIAN_FRONTEND=noninteractive
-ENV TZ=Europe/Paris
-ENV BUILD_UHD_FROM_SOURCE=True
-ENV UHD_VERSION=4.4.0.0
-
-#install developers pkg/repo
-RUN apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get upgrade --yes && \
-    DEBIAN_FRONTEND=noninteractive apt-get install --yes \
-       #gcc needed for build_oai
-       build-essential \
-       psmisc \
-       git \
-       xxd \
-       # python3-pip for conf template generation
-       python3-pip && \
-    pip3 install --ignore-installed pyyaml
-
-# Add "Tini - A tiny but valid init for containers", https://github.com/krallin/tini
-# it will be copied into target containers, to print exit numbers and handle signals properly
-ENV TINI_VERSION v0.19.0
-ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /tini
-RUN chmod +x /tini
-
-# In some network environments, GIT proxy is required
-RUN /bin/bash -c "if [[ -v NEEDED_GIT_PROXY ]]; then git config --global http.proxy $NEEDED_GIT_PROXY; fi"
-
-#create the WORKDIR
-WORKDIR /oai-ran
-COPY . .
-
-#run build_oai -I to get the builder image
-RUN /bin/sh oaienv && \ 
-    cd cmake_targets && \
-    mkdir -p log && \
-    ./build_oai -I -w USRP --install-optional-packages