Fix Debian:sid container env build

This patch is a fix for the scheduled `SID` build & publish workflow:
https://github.com/MariaDB/buildbot/actions/runs/22814064687/job/66253037585

```bash
E: Unable to satisfy dependencies. Reached two conflicting assignments:
   1. libboost1.83-dev:amd64 is selected for install because:
      1. libboost-system-dev:amd64=1.83.0.2+b2 is selected for install
      2. libboost-system-dev:amd64 Depends libboost-system1.83-dev
      3. libboost-system1.83-dev:amd64 Depends libboost1.83-dev (= 1.83.0-5+b2)
   2. libboost1.83-dev:amd64 is available in version 1.83.0-5+b2
      but none of the choices are installable:
      - libboost1.83-dev:amd64=1.83.0-5+b2 is not selected for install because:
        1. libboost-dev:amd64 is selected for install
        2. libboost-dev:amd64 Depends libboost1.90-dev
        3. libboost1.90-dev:amd64 Conflicts libboost1.83-dev
```

`libboost` is now 1.90 in `SID`,  `libboost-system-dev`
is no longer a STUB and was not released as a package in 1.90.
Trying to install it will generate conflicts with the other boost development packages.

Author: RazvanLiviuVarzaru

ci_build_images/debian.Dockerfile

@@ -23,6 +23,7 @@ RUN . /etc/os-release \
       exit 1; \
     fi
 
+ARG BASE_IMAGE
 ARG ARCH_VARIANT=
 ENV ARCH_VARIANT=$ARCH_VARIANT
 # Install updates and required packages
@@ -71,7 +72,11 @@ RUN . /etc/os-release \
     libasio-dev \
     # bootstrapping libboost additions in below line for MDEV-35826. \
     # to be removed after https://github.com/MariaDB/server/pull/2651 merge to 11.4 \
-    libboost-atomic-dev libboost-chrono-dev libboost-date-time-dev libboost-regex-dev libboost-system-dev libboost-thread-dev \
+    libboost-atomic-dev \
+    libboost-chrono-dev \
+    libboost-date-time-dev \
+    libboost-regex-dev \
+    libboost-thread-dev \
     libboost-dev \
     libboost-filesystem-dev \
     libboost-program-options-dev \
@@ -90,6 +95,7 @@ RUN . /etc/os-release \
     socat \
     sudo  \
     wget \
+    && if [[ $BASE_IMAGE != "debian:sid" ]]; then apt-get -y install --no-install-recommends libboost-system-dev; fi \
     && if [ "$(getconf LONG_BIT)" = 64 ]; then apt-get -y install --no-install-recommends galera-4; fi \
     && if [ "${VERSION_ID}" != 11 ]; then \
       # Bootstrap MDEV-32686 so only temporary until https://github.com/MariaDB/server/pull/3692 merged up \