Enable constant folding for Arm64 SVE

[a74nh]

CoreCLR is able to constant fold standard intrinsics. Eg AdvSimd.Add can be constant folded as a standard add node.

This needs enabling for Arm64 SVE.

Firstly, add SVE nodes to the switch in GetOperForHWIntrinsicId(), then fix all the resulting issues.

See discussions #117313 (comment) and #117313 (comment)

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[a74nh]

Setting this to .NET 11 as it's fairly useful to do