Moves the shared deletion e2e helpers from e2e_author_only_deletion into
tests/support so both suites reuse them, and checks that a deletion of a
version needs k=44300, is author-only on every read surface and live, and
leaves the version gone.
Co-authored-by: Will Pfleger <pfleger.will@gmail.com>
Signed-off-by: Will Pfleger <pfleger.will@gmail.com>