Add tests for bytea LIKE operator

A few more easy tests for things not covered at all:

bytea LIKE bytea (bytealike)
bytea NOT LIKE bytea (byteanlike)
ESCAPE clause for the above (like_escape_bytea)

also

name NOT ILIKE text (nameicnlike)

See also
<https://coverage.postgresql.org/src/backend/utils/adt/like.c.func-sort-c.html&gt;.