[llvm] [RISCV] Don't overcost wide load in optimized segment load/store (PR #207146)

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github-actions[bot] wrote:

test-suite diff from 6f9ac38b7c1934fbce49683e32c732c73e5e1ab4...50eba5d2a9a176a31b06bc64a0a2055c4d7381ca: https://github.com/llvm/llvm-project/actions/runs/28591581714/artifacts/8042382783

https://github.com/llvm/llvm-project/pull/207146