[llvm] [LoongArch] Strengthen stack size estimation for LSX/LASX extension (PR #146455)

[Lu Weining via llvm-commits]

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SixWeining wrote:

Remove this test. We only need to check the change `!isInt<7>(EstimateStackSize)` take effect by examining the frame size.

https://github.com/llvm/llvm-project/pull/146455