Add support for Clang 16

[externl]

Compiling with Clang 16 shipped with macOS Sequoia (15.0) gives some errors. There are likely more.

n file included from src/Ice/generated/Process.cpp:23:
include/Ice/OutgoingAsync.h:359:32: error: declaration shadows a local variable [-Werror,-Wshadow-uncaptured-local]
  359 |             _response = [this, response = std::move(response)](bool ok)
      |                                ^
include/Ice/OutgoingAsync.h:353:36: note: previous declaration is here
  353 |             std::function<void(R)> response,
      |                                    ^
include/Ice/OutgoingAsync.h:395:32: error: declaration shadows a local variable [-Werror,-Wshadow-uncaptured-local]
  395 |             _response = [this, response = std::move(response)](bool ok)
      |                                ^
...

See

• [clang] -Wshadow option produces a warning when explicitly capturing class member using the same name llvm/llvm-project#71976
• See [clang] -Weverything option produces a warning(-Wshadow-uncaptured-local) when explicitly capturing a local value using std::move() llvm/llvm-project#81307