If the "name" setting does not exist, then get it from the "fontFamily" setting.

To avoid reflection issues on different PHP versions and
potential contributor confusion, merging the new tests into
the existing test.

Do not the "name" settting. Instead only use the required "fontFamily" setting.

Co-authored-by: Brian Alexander <824344+ironprogrammer@users.noreply.github.com>

…he former is not being used

Co-authored-by: Brian Alexander <824344+ironprogrammer@users.noreply.github.com>

Co-authored-by: Brian Alexander <824344+ironprogrammer@users.noreply.github.com>

Because `WP_Font_Face_Resolver` already exists in Core release code, this update cannot be tested in CI without migrating the code into a temporary `_Gutenberg` resolver, which will complicate syncing back to Core.

Test will be added to a follow-up PR, to merge once this update is synced to Core.

Note that this test does succeed when run locally against WP `trunk` (currently 6.4-alpha).