We weren't actually enabling WGSL validating in Tint in the E2E test
runner.
Mark a few tests as SKIP for cases that do not actually validate.
Change-Id: I62a55ce701f704d744c32f2cd5cb97683e270e96
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/117960
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: James Price <jrprice@google.com>
Kokoro: Ben Clayton <bclayton@google.com>