Rename digital-credential WPT files
This CL renames the digital-credential WPT files. The intention of this
CL is to make #46642
easier to review as the renamed files are showing up as added+deleted in
Github.
BUG=5622820
Change-Id: Ia623539e5bc373e523d9ba27c930b4dab076be8e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5631578
Commit-Queue: Peter Kotwicz pkotwicz@chromium.org
Reviewed-by: Nicolás Peña npm@chromium.org
Cr-Commit-Position: refs/heads/main@{#1315269}