[Bug libstdc++/110339] Implement C++26 library features

[tkaminsk at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110339
Bug 110339 depends on bug 119126, which changed state.

Bug 119126 Summary: [C++26] Implement P0792R14 function_ref: a type-erased 
callable reference
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119126

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED