microsoft#4351)

Merge `main` to `feature/generator`

Resolved conflict in yvals_core.h, removing all guards around `__cpp_lib_generator` except `_HAS_CXX23`.
* `__cpp_lib_concepts` is now always available in C++20 and later.
* `<generator>` doesn't care about `std::byte` now.
* C1XX, Clang, and EDG all define `__cpp_impl_coroutine` in C++20 and later, which wasn't the case earlier.

Also add a missing semicolon - this emits a `_Pragma`.

VSO-1951821 "EDG instantiates the wrong overload of `promise_type::operator new` for `generator` machinery"

Merge `main` to `feature/generator`

Merge `main` to `feature/generator`

…4464)

Merge `main` to `feature/generator`

Co-authored-by: Stephan T. Lavavej <stl@nuwen.net>

Resolved a trivial merge conflict in `<ranges>` with the `inline constexpr` change for `_Compile_time_max_size`.

Merge `main` to `feature/generator`

Co-authored-by: Casey Carter <cacarter@microsoft.com>

Merge `main` to `feature/generator`

…crosoft#4621)

Co-authored-by: Stephan T. Lavavej <stl@nuwen.net>
Co-authored-by: Alex Guteniev <gutenev@gmail.com>

…ource>` after GH 4952.

* `const`-ify members of awaitable objects that can be `const`.
* Annotate that the iterator's `operator*` has a `/* strengthened */` _noexcept-specifier_.

Several minor nits, and I burned away all the unnecessary parts of "mutable rvalue reference type". Don't know where I was heading with it, but it never made it there.