Add cleanup for build2 directory in postcompile script to save space

Author: mcserep

.github/scripts/ubuntu-22.04/postcompile_build.sh

@@ -6,4 +6,5 @@ echo "${INSTALL_PATH}/odb/bin" >> $GITHUB_PATH
 echo "CMAKE_PREFIX_PATH=${INSTALL_PATH}/odb:$CMAKE_PREFIX_PATH" >> $GITHUB_ENV
 
 # Clean up dependency sources and intermediate binaries to save space
-rm -rf ${DOWNLOAD_PATH}/odb
+rm -rf ${DOWNLOAD_PATH}/odb
+rm -rf ${INSTALL_PATH}/build2