[AMDGPU][True16[MC] true16 for v_max3/min3_num_f16 (#121510)
V_MAX3/MIN3_NUM_F16 are alias GFX12 instructions with V_MAX3/MIN3_F16 in
GFX11 and they should be updated together.
This fix a bug introduced in
https://github.com/llvm/llvm-project/pull/113603 such that only
V_MAX3/MIN3_F16 are replaced in true16 format. Also added GFX12 runlines
for CodeGen test