[clang] [Clang][Parser] Accept P2741R3 (static_assert with user-generated message) in C++11 as an extension (PR #102044)

[Yashwant Singh via cfe-commits]

yashssh wrote:

https://isocpp.org/files/papers/N4860.pdf according to this, cpp_static_assert should be 201411L for c++20


https://github.com/llvm/llvm-project/pull/102044