revert the PR middle-end/57245 patch (RHEL-76359)

honor -frounding-math in real truncation (PR middle-end/57245, RHEL-73749)

fix TARGET_CPU_DEFAULT (PR target/105157, RHEL-50037)
libstdc++: Workaround kernel-headers on s390x-linux (RHEL-50054)
fix wrong code with memcpy from _Complex (PR tree-optimization/116034)

update from releases/gcc-11 branch (RHEL-35635)
GCC 11.5 release
PRs ada/113893, ada/113979, analyzer/104042, c/113262, c/114007, c/114493,
profile/114115, libfortran/110651,
end/90348,
end/95351, middle-end/107385, middle-end/108789,
end/110027, middle-end/110115, middle-end/110176,
end/111422, middle-end/111632, middle-end/112732,
end/113907, middle-end/113921, middle-end/114599,
end/114734, middle-end/114753, middle-end/115527,
end/115836, objc/101666, objc/101718, preprocessor/105608,
optimization/100303, rtl-optimization/108086,
optimization/110079, rtl-optimization/114768,
optimization/114902, rtl-optimization/115092, sanitizer/97696,
optimization/110386, tree-optimization/110422,
optimization/111039, tree-optimization/111070,
optimization/111331, tree-optimization/111407,
optimization/111445, tree-optimization/111736,
optimization/112495, tree-optimization/112505,
optimization/112793, tree-optimization/113372,
optimization/113552, tree-optimization/113603,
optimization/114027, tree-optimization/114115,
optimization/114566, tree-optimization/114876,
optimization/115192, tree-optimization/115337,
optimization/115843
fix FLUSH IOSTAT value (PR libfortran/101255, RHEL-32536)
fix conditions for using memcmp in

update from releases/gcc-11-branch (RHEL-17638)
PRs c++/106310, c++/106890, c++/109666, c++/109761, c++/111357,
end/110200, middle-end/111699, middle-end/111818,
end/112733, rtl-optimization/110237, sanitizer/112727,
optimization/110298,
optimization/110731, tree-optimization/110914,
optimization/111015, tree-optimization/111614,
optimization/111764, tree-optimization/111917
use -fno-stack-protector in some aarch64 tests

fix member vs global template (RHEL-2607)

guard the bit test merging code in if-combine (RHEL-6068)

fix ICE on pr96024.f90 on big-endian hosts (PR fortran/96024, #2213211)
use -fno-stack-protector to fix bit-field aarch64 tests (#2213221)

update from releases/gcc-11-branch (#2193180)
GCC 11.4 release
PRs bootstrap/90543, c++/53932, c++/69410, c++/92752, c++/98056,
end/104450, middle-end/104464,
end/106190, middle-end/107317, middle-end/108237,
end/108264, middle-end/108435, middle-end/108459,
end/108546, middle-end/108625, middle-end/108685,
end/108854, other/108560, other/109306,
optimization/106751, rtl-optimization/107482,
optimization/108193, rtl-optimization/108596,
optimization/109585, target/70243, target/90458, target/96373,
optimization/105484,
optimization/106809, tree-optimization/107107,
optimization/107212, tree-optimization/107254,
optimization/107323, tree-optimization/107451,
optimization/107554, tree-optimization/107898,
optimization/107997, tree-optimization/108068,
optimization/108076, tree-optimization/108095,
optimization/108199, tree-optimization/108498,
optimization/108688, tree-optimization/108692,
optimization/108821, tree-optimization/108950,
optimization/109176, tree-optimization/109410,
optimization/109473, tree-optimization/109491,
optimization/109502, tree-optimization/109573,
optimization/109724, tree-optimization/109778
PRs fortran/100607, libstdc++/109822, target/109954,
optimization/109505

s390x: add support for register arguments preserving (#2168204)