The ES100 texture built-ins are now (similarly to ES300 ones) grouped
based on whether they include a Bias, or Lod.

Bug: angleproject:4889
Change-Id: I495af48644c68286b1b0cc2a5580566fdd22cfc9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2987859Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>