[C++] [Coroutines] Does GCC want to support `-fno-coroutines`?

[chuanqi.xcq via Gcc]

Hi,
 We're discussing to implement `-fno-coroutines` in clang so that we can 
disable the coroutine feature with C++ standard higher than 20.
A full discussion can be found here: https://reviews.llvm.org/D156247. A major 
motivation for us to do this is to keep consistency with GCC.
However, we don't find `-fno-coroutines` in 
https://gcc.gnu.org/onlinedocs/gcc-13.2.0/gcc/C_002b_002b-Dialect-Options.html#index-fcoroutines.
Then we're not sure if GCC intends to support it. And we want to ask opinions 
from GCC developers for `-fno-coroutines`.
Thanks,
Chuanqi