Vulkan: Enable end2end tests for ES2_VULKAN everywhere Used a script to find test files that have more ES2_OPENGL() invocations than ES2_VULKAN(), and added ES2_VULKAN() to those. There may be false negatives. Bug: angleproject:1578 Change-Id: I938eb3571c909879e9276b355a9f1d324880f99a Reviewed-on: https://chromium-review.googlesource.com/c/1324350 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>