Migrate to new baseline format - all the rest

The new baselines format for test harness tests is machine parsable.
Do this incrementally to make it easier to handle and review.

With this change, we will be able to regenerate WPT metadata from baselines.

Note to Gardeners: Please don't revert this CL if there are
individual test failures. Pls ping and I can rebaseline for
such tests.

Bug: 1481730
Change-Id: Ib87bcec6f11a1882142d8fa657789c66bc37c08b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4953618
Reviewed-by: Jonathan Lee <jonathanjlee@google.com>
Commit-Queue: Weizhong Xia <weizhong@google.com>
Cr-Commit-Position: refs/heads/main@{#1212468}