Previously we would bind the full Vulkan buffer size in cases of
unsized arrays in storage buffers. This then would lead to problems
when binding a dynamic buffer that used sub-allocation or larger
internal sizes. Instead use the GL binding size or GL buffer size as
the size limits.

Bug: angleproject:4380
Change-Id: Ia579bfeae3b8d068813336cbd5e1babee9f4f345
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2168020Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>