[llvm] [RegAlloc] Fix the terminal rule check for interfere with DstReg (PR #168661)

[via llvm-commits]

hstk30-hw wrote:

Fix all failed testcase.
I also push a commit https://github.com/hstk30-hw/llvm-project/commit/d86334e8e0b8674b368c78b30032069ed1d6cd1c  which  compare the old testcases that not turn on terminal rule with default turn on.  

https://github.com/llvm/llvm-project/pull/168661