[AMDGPU][True16][CodeGen] update test fmax3/fmin3 test with true16 mode (llvm#140752)

This is a NFC patch.

This patch duplicate GFX11plus runlines and apply them with
"+mattr=+real-true16" and "+mattr=-real-true16" on fmax3/fmin3 tests,
and putting '-real-true16' on gisel testline. And then update the test
with the update script

Author: broxigarchen