Add ColMajor decoration to matrix test cases that ultimately
become end2end test cases.
Corresponds to end2end test fix in
https://dawn-review.googlesource.com/c/dawn/+/103821
Change-Id: I30e9f706dcb935a6044ba650e5c9084363a1414b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/104400
Kokoro: Kokoro <noreply+kokoro@google.com>
Auto-Submit: David Neto <dneto@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>