ci: install GCC 11 and use it on sqlite build

Author: kwvg

ci/test/00_setup_env_native_sqlite.sh

@@ -10,4 +10,4 @@ export CONTAINER_NAME=ci_native_sqlite
 export PACKAGES="python3-zmq qtbase5-dev qttools5-dev-tools libdbus-1-dev libharfbuzz-dev"
 export DEP_OPTS="NO_BDB=1 NO_UPNP=1 DEBUG=1"
 export GOAL="install"
-export BITCOIN_CONFIG="--enable-zmq --enable-reduce-exports --with-sqlite --without-bdb"
+export BITCOIN_CONFIG="--enable-zmq --enable-reduce-exports --with-sqlite --without-bdb CC=gcc-11 CXX=g++-11"

contrib/containers/ci/Dockerfile

@@ -171,6 +171,7 @@ RUN set -ex; \
 RUN apt-get update && apt-get install $APT_ARGS \
     bc \
     gawk \
+    g++-11 \
     g++-14 \
     g++-arm-linux-gnueabihf \
     g++-mingw-w64-x86-64 \