Tint/E2E: Add f16 uniform/storage buffer E2E tests
This CL add Tint E2E tests for f16 types in uniform and storage buffers.
Bug: tint:1473, tint:1502
Change-Id: I325524d2df326240cc1b080a90abf5bd076b3da1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107543
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Zhaoming Jiang <zhaoming.jiang@intel.com>