On 32bit builds we were only storing 32bit handles for non-
dispatchable objects. This resulted in the handles getting shrunk
from 64-bits which then led to false validation errors.

Fixed this by using VK_DEFINE_NON_DISPATCHABLE_HANDLE() macro in
GarbageObject instead of VK_DEFINE_HANDLE().

Also MSVC on Win32 didn't like reinterpret_cast<> with the updated
64bit handles so migrated a number of GarbageHandle casts to be
c-style which is contrary to style guide, but is preferable to
conditional code.

Bug: angleproject:3924
Bug: angleproject:3946
Change-Id: Icb4139e34989179e46ac1f0c76269ff49ab1e897
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1873244
Commit-Queue: Tobin Ehlis <tobine@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>