Fixes an implied dependency cycle between translator and angle_common. This will also allow us to be more strict about declaring dependencies on GLSLANG headers.

Tested by building and running angle_unit_tests on Linux.

Bug: angleproject:4672
Change-Id: I331230d2cf179ccea140ee7a0d5a3c8768c58cb1
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2222682Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>