[clang] [Clang][AArch64] Fix crash with large arguments to MTE built-ins (PR #197620)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

Doesn't CheckImplicitConversions() normally get called later through CheckCompletedExpr()?

Anyway, the helper you want is probably convertArgumentToType().

https://github.com/llvm/llvm-project/pull/197620