This reverts commit fd97c334.

Reason for revert: The specialization constant for rotation causes
performance regression with older qualcomm driver. We need to keep the
driver uniform code path for the older driver.

Original change's description:
> Vulkan: Remove rotation related data from driver uniform
>
> Rotation is now handled in the shader compiler with specialization
> constant, it should be removed from driver uniforms. Since Metal is
> using the flipXY, flipXY/negFlipXY are still kept in the shader side
> implementation, but have moved to TranslatorMetal in this CL.
>
> Bug: b/171750979
> Change-Id: Ie8d15ef227cb52a6e19e4319ecc9f09bda42e667
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2519863
> Reviewed-by: Ian Elliott <ianelliott@google.com>
> Reviewed-by: Tim Van Patten <timvp@google.com>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Commit-Queue: Charlie Lao <cclao@google.com>

TBR=ianelliott@google.com,timvp@google.com,jmadill@chromium.org,cclao@google.com

Bug: b/171750979
Change-Id: Iff9cffb28851ade1d9c5cd23fde73910a19867ce
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2547808Reviewed-by: Ian Elliott <ianelliott@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Charlie Lao <cclao@google.com>
Commit-Queue: Charlie Lao <cclao@google.com>