ExtendedDirtyBitType qualifies DIRTY_BIT_EXTENDED dirtybit.
Clip control code path can now set the appropriate ExtendedDirtyBitType
when there is a change in state. Also remove the ClipSpaceOrigin member
in the Vulkan backend that cached front-end state.

Bug: angleproject:5471
Tests: dEQP-GLES2.functional.clip_control.*
Change-Id: I8dbb509ef940e7905439d32483fd67a8fc171a6e
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2673062Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Mohan Maiya <m.maiya@samsung.com>