Merge tag '2025.w42' into HEAD

Integration 2025 week 42

* !3623 Optimization of PDSCH precoding operation
* !3691 \[CI\] Ensure multi-arch DockerHub Push after successful image build
* !3696 asn1c doesn't follow c99 variables alias rules, it needs to be compiled this...
* !3685 Assign antenna ports correctly for 1 and 2 layers for aerial.
* !3495 Type0 PDSCH frequency allocation at L1 UE
* !3686 Remove NR L2 simulator code from UE
* !3693 Remove B200-specific clock-rate setting
* !3701 OAI UE: add shared RSRP Table 10.1.6.1-1 mapping function to helpers and adopt it RRC UE
* !3662 RRC UE file cleanup
* update doc/README.md
* !3608 use common scale channel functions for DLSCH and ULSCH
* !3694 fix non initialized DMRS port value in case of DCI00 at UE
* !3702 Extend F1 rfsim CI test
* !3704 remove unused global queues, dead code
* !3673 CI: Aerial: Add an UL-heavy pipeline test
* !3651 CI: Upgrade HO setup to use an attenuator
* !3695 CI: Upgrade Aerial setup to 25-2.1

docker/Dockerfile.base.ubuntu

@@ -14,8 +14,6 @@ RUN apt-get update && \
        ccache \
        psmisc \
        git \
-       gcc-12 \
-       g++-12 \
        xxd \
        libpcre2-dev \
        python3-dev \
@@ -45,6 +43,7 @@ COPY cmake_targets/build_oai .
 WORKDIR /oai-ran
 COPY oaienv .
 
+#run build_oai -I to get the builder image
 RUN /bin/sh oaienv && \ 
     cd cmake_targets && \
     mkdir -p log && \