Merge branch 'releases/gcc-12' into devel/omp/gcc-12

Merge up to r12-9090-g591ec4820aa4e6d757ddc76cae1d92d445daf72c (30th Jan 2023)

diff --cc gcc/config.gcc
Simple merge

diff --cc gcc/config/i386/i386.cc
Simple merge

diff --cc gcc/doc/invoke.texi
Simple merge

diff --cc gcc/fortran/decl.cc
Simple merge

diff --cc gcc/fortran/interface.cc
Simple merge

diff --cc gcc/fortran/trans-openmp.cc
Simple merge

diff --cc gcc/opts.cc
Simple merge