[clang-tools-extra] [clang-tidy][C++20] Add support for aggregate types within modernize-use-emplace (PR #131969)

[David Rivera via cfe-commits]

================
@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s modernize-use-emplace %t -- \
+// RUN: %check_clang_tidy %s -std=c++17 modernize-use-emplace %t -- \
----------------
RiverDave wrote:

On second thought would this be sufficient for the cases shown above?:
I've noticed that `use-ranges.cpp` uses  a custom suffix bound to a standard
```cpp
// RUN: %check_clang_tidy -std=c++23 %s modernize-use-ranges %t -check-suffixes=,CPP23 -- -I %S/Inputs/
// CHECK-FIXES-CPP23: #include <numeric>

```
I could implement cases with designated initializer in a separate  c++20 file.

https://github.com/llvm/llvm-project/pull/131969