Fix LLVM compile warning message for deprecated-declarations

[chenyukang]

llvm-wrapper is giving this kind of warning messages when x b, this PR will fix it:

warning: llvm-wrapper/PassWrapper.cpp:526:7: warning: 'any_isa<const llvm::Module *>' is deprecated: Use any_cast(Any*) != nullptr instead [-Wdeprecated-declarations]
warning:   if (any_isa<const Module *>(WrappedIr))
warning:       ^~~~~~~
warning:       any_cast
warning: /Users/yukang/rust/build/aarch64-apple-darwin/ci-llvm/include/llvm/ADT/Any.h:130:1: note: 'any_isa<const llvm::Module *>' has been explicitly marked deprecated here
warning: LLVM_DEPRECATED("Use any_cast(Any*) != nullptr instead", "any_cast")
warning: ^
warning: /Users/yukang/rust/build/aarch64-apple-darwin/ci-llvm/include/llvm/Support/Compiler.h:143:50: note: expanded from macro 'LLVM_DEPRECATED'
warning: #define LLVM_DEPRECATED(MSG, FIX) __attribute__((deprecated(MSG, FIX)))
warning:                                                  ^
warning: llvm-wrapper/PassWrapper.cpp:528:7: warning: 'any_isa<const llvm::Function *>' is deprecated: Use any_cast(Any*) != nullptr instead [-Wdeprecated-declarations]
warning:   if (any_isa<const Function *>(WrappedIr))
warning:       ^~~~~~~
warning:       any_cast

[rustbot]

r? @cuviper

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[cuviper]

There is already a PR at #110523 -- let's give that author a chance to respond, but at a glance I think yours also has a problem with not choosing the right any_cast overload.

[chenyukang]

Oh, I didn't notice it.
Will close this PR.