[llvm] [AArch64][LoopVectorize] Use upper bound trip count instead of the constant TC when choosing max VF (PR #67697)

[David Sherwood via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
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david-arm wrote:

Does it make sense to move this test into the existing Transforms/LoopVectorize/AArch64/clamped-trip-count.ll file?

https://github.com/llvm/llvm-project/pull/67697