ci: don't build using -Werror when using GCC

Now that our set of warnings has expanded, strict enforcement results
in build failure. Those warnings will be resolved and this flag reverted
in a subsequent pull request.

Author: kwvg

ci/test/00_setup_env_arm.sh

@@ -26,3 +26,4 @@ export GOAL="install"
 # -Wno-psabi is to disable ABI warnings: "note: parameter passing for argument of type ... changed in GCC 7.1"
 # This could be removed once the ABI change warning does not show up by default
 export BITCOIN_CONFIG="--enable-reduce-exports CXXFLAGS=-Wno-psabi --with-boost-process"
+export NO_WERROR=1

ci/test/00_setup_env_native_nowallet.sh

@@ -12,3 +12,4 @@ export PACKAGES="python3-zmq"
 export DEP_OPTS="NO_WALLET=1 CC=gcc-14 CXX=g++-14"
 export GOAL="install"
 export BITCOIN_CONFIG="--enable-reduce-exports --with-boost-process CC=gcc-14 CXX=g++-14"
+export NO_WERROR=1

ci/test/00_setup_env_native_qt5.sh

@@ -16,3 +16,4 @@ export RUN_UNIT_TESTS="false"
 export GOAL="install"
 export PREVIOUS_RELEASES_TO_DOWNLOAD="v0.15.0.0 v0.16.1.1 v0.17.0.3 v18.2.2 v19.3.0 v20.0.1"
 export BITCOIN_CONFIG="--enable-zmq --with-libs=no --enable-reduce-exports --disable-fuzz-binary LDFLAGS=-static-libstdc++ --with-boost-process"
+export NO_WERROR=1

ci/test/00_setup_env_native_sqlite.sh

@@ -11,3 +11,4 @@ export PACKAGES="python3-zmq qtbase5-dev qttools5-dev-tools libdbus-1-dev libhar
 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 CC=gcc-11 CXX=g++-11"
+export NO_WERROR=1

ci/test/00_setup_env_win64.sh

@@ -18,3 +18,4 @@ export GOAL="deploy"
 # https://github.com/mingw-w64/mingw-w64/commit/1690994f515910a31b9fb7c7bd3a52d4ba987abe
 export BITCOIN_CONFIG="--enable-gui --enable-reduce-exports --disable-miner --without-boost-process CXXFLAGS='-Wno-return-type -Wno-error=maybe-uninitialized -Wno-error=array-bounds'"
 export DIRECT_WINE_EXEC_TESTS=true
+export NO_WERROR=1