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>.