Merge bitcoin/bitcoin#23803: ci: Disable s390x gui tests for now

fa6a548f54 ci: Disable s390x gui tests for now (MarcoFalke)

Pull request description:

ACKs for top commit:
  hebasto:
    ACK fa6a548f54, tested locally with

Tree-SHA512: 077bcda0b4612dfbf538eb2999ce9f32ec3739c2ed5709f7c4c5d1a39738fbe6e549bd54b237152fd808736c15af1024e67c95dc87b4c3102738543522cb14d7

ci/test/00_setup_env_s390x.sh

@@ -14,7 +14,7 @@ export PACKAGES="python3-zmq"
 if [ -n "$QEMU_USER_CMD" ]; then
   # Likely cross-compiling, so install the needed gcc and qemu-user
   export DPKG_ADD_ARCH="s390x"
-  export PACKAGES="$PACKAGES g++-s390x-linux-gnu qemu-user libc6:s390x libstdc++6:s390x libfontconfig1:s390x libxcb1:s390x"
+  export PACKAGES="$PACKAGES g++-s390x-linux-gnu qemu-user libc6:s390x libstdc++6:s390x"
 fi
 # Use debian to avoid 404 apt errors
 export CONTAINER_NAME=ci_s390x
@@ -23,4 +23,4 @@ export TEST_RUNNER_ENV="LC_ALL=C"
 export TEST_RUNNER_EXTRA="--exclude rpc_bind,feature_bind_extra"  # Excluded for now, see https://github.com/bitcoin/bitcoin/issues/17765#issuecomment-602068547
 export RUN_FUNCTIONAL_TESTS=true
 export GOAL="install"
-export BITCOIN_CONFIG="--enable-reduce-exports --with-incompatible-bdb"
+export BITCOIN_CONFIG="--enable-reduce-exports --disable-gui-tests"  # GUI tests disabled for now, see https://github.com/bitcoin/bitcoin/issues/23730