[Bug]: Unable to build with DCMAKE_CXX_STANDARD=23

[richqubit]

Describe the issue

Building gives a compile error, which is not present with C++20 :

3rdparty/abseil-cpp/absl/container/internal/compressed_tuple_test.cc:47:10: error: non-const lvalue reference to type 'CompressedTuple<...>' cannot bind to a temporary of type 'CompressedTuple<...>
'                                                                                                                                                                                                                          
   47 |   return t;                                                                                          
      |          ^                                                                                           
...

Steps to reproduce the problem

Build with DCMAKE_CXX_STANDARD=23

What version of Abseil are you using?

lts_2025_01_27

What operating system and version are you using?

linux fedora 41

What compiler and version are you using?

Clang 19.1.7

What build system are you using?

Ninja

Additional context

No response