[llvm] [RISCV] Split vector FP pseudo instructions by SEW (PR #87686)

[Michael Maitland via llvm-commits]

michaelmaitland wrote:

This PR is closed by the individual commits 5fa58e28f34f4b5b41dd2869212ac917fb42b2e3, aece68269c8cb28e16dc5c4ec9aabecb807a0438, d309d7e4fe51a0ff0ce6430a8af585e2af2772a3, c6b7944be4dfbb1fb35301c670812726845acaa7, 43248ffea7b8de3a33b11768e8c21d2434252528, andb8e1ff322104e5445371328a4fbc9c1d2bf82f01

https://github.com/llvm/llvm-project/pull/87686