[clang] [clang] Add support for MSVC force inline attrs (PR #185282)

[Trung Nguyen via cfe-commits]

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+// RUN: %clang_cc1 -std=c++23 -emit-llvm %s -triple x86_64-pc-windows-msvc -o - | FileCheck %s
+
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trungnt2910 wrote:

For the `[[msvc::forceinline_calls]]`, I agree, but for `[[msvc::forceinline]]`, as I mentioned, there are no attributes to check for at the call site.

The point of `[[msvc::forceinline]]` is for the call site to vanish no matter what.

https://github.com/llvm/llvm-project/pull/185282