[clang] [Clang][AArch64] Use __clang_arm_builtin_alias for overloaded svreinterpret's (PR #92427)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

However we choose to emit this particular builtin, should we provide a way to write a function like this?  Like, the caller has to either support sve, or have streaming enabled.  Maybe call it __arm_streaming_compatible_requires_sve.

https://github.com/llvm/llvm-project/pull/92427