[llvm] [RISCV][CostModel] Estimate cost of Extract/InsertElement with non-constant index when vector instructions are not available (PR #67334)

[Sergey Kachkov via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 3
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skachkov-sc wrote:

Pull request consists from 2 commits (pre-commit test and code change), that can be checked separately (by choosing the required one on GitHub's commits tab)

https://github.com/llvm/llvm-project/pull/67334