[clang] [clang] Enable C++17 relaxed template template argument matching by default (PR #89807)

[via cfe-commits]

cor3ntin wrote:

We operated a partial revert here https://github.com/llvm/llvm-project/pull/91811
That should fix the issues in trunk while we investigate the regression more thoroughly 

https://github.com/llvm/llvm-project/pull/89807