BUILD: Add flags for release builds for the CI

CMakeLists.txt

@@ -41,6 +41,10 @@ endif()
 ###                  ###
 
 set(${CMAKE_C_COMPILER_ID}_C_FLAGS)
+set(${CMAKE_BUILD_TYPE}_C_FLAGS)
+set(RelWithDebInfo_C_FLAGS
+    -Wno-switch # For the CI
+)
 set(COMMON_C_FLAGS
     -Wall -Wextra -Werror
     -Wshadow