[llvm] [RISCV] Move ActiveElementsAffectResult to TSFlags. NFC (PR #101123)

[Pengcheng Wang via llvm-commits]

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@@ -171,6 +174,12 @@ static inline bool hasRoundModeOp(uint64_t TSFlags) {
 /// \returns true if this instruction uses vxrm
 static inline bool usesVXRM(uint64_t TSFlags) { return TSFlags & UsesVXRMMask; }
 
+/// \returns true if the result in each element depends on the active elements
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wangpc-pp wrote:

`in each element` may not be true, result of reductions have only one element.

https://github.com/llvm/llvm-project/pull/101123