autofill: Add test data used by dom_label_browsertest.cc to iOS bundle

The test relies on files in //components/test/data/autofill/label-doms
to both generate test names as well as to run tests.

This was not working properly on iOS (with Blink) because the required
test data was not part of the generated bundle.

This CL adds the proper .filelist and .globlist files to the test data
directory and adds the build system plumbing to add the data to the iOS
bundle when building the browser_tests target.

Fixed: 424760421
Change-Id: Ia3fc0fcfa0690b7449b50babe7f06d9e75fbaed1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6638777
Reviewed-by: Colin Blundell <blundell@chromium.org>
Auto-Submit: Raphael Kubo da Costa <kubo@igalia.com>
Commit-Queue: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1474189}