[C++] [Coroutines] Prefer aligned (de)allocation for coroutines -

implement the option2 of P2014R0

This implements the option2 of
https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p2014r0.pdf.

This also fixes https://github.com/llvm/llvm-project/issues/56671.

Although wg21 didn't get consensus for the direction of the problem,
we're happy to have some implementation and user experience first. And
from issue56671, the option2 should be the pursued one.

Reviewed By: ychen

Differential Revision: https://reviews.llvm.org/D133341