Merge branch 'bugfix/smtp_strict_prototypes_fix_v4.0' into 'release/v4.0'

ci: re-add the lost PEDANTIC_{C,CXX}FLAGS in CMake example builds (backport v4.0)

See merge request espressif/esp-idf!7600

tools/ci/build_examples_cmake.sh

@@ -43,6 +43,9 @@ if [ -z ${CI_NODE_INDEX} ]; then
     echo "Assuming CI_NODE_INDEX=${CI_NODE_INDEX}"
 fi
 
+export EXTRA_CFLAGS="${PEDANTIC_CFLAGS:-}"
+export EXTRA_CXXFLAGS="${PEDANTIC_CXXFLAGS:-}"
+
 set -o nounset # Exit if variable not set.
 
 export REALPATH=realpath