ci: Migrate CI scripts to CMake

ci/test/00_setup_env_s390x.sh

@@ -13,4 +13,4 @@ export CI_IMAGE_NAME_TAG="docker.io/s390x/ubuntu:24.04"
 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"
+export BITCOIN_CONFIG="-DREDUCE_EXPORTS=ON"