test(config): use file_format 1.0 in test fixtures (#5307)

The vendored schema is v1.0.0 (since #4965); update the remaining
test fixtures that still referenced 1.0-rc.1 / 0.1 so they reflect the
stable schema version.

Co-authored-by: Lukas Hering <40302054+herin049@users.noreply.github.com>