Escape contains patterns for utf8 like kernels

[Dandandan]

Describe the bug

@jhorstmann identified in #2521

like supports escape characters now (#2258), so I think this also needs to check that the string does not end with '%'

To Reproduce

Fails on master:

    test_utf8_scalar!(
        test_utf8_scalar_like_escape_contains,
        vec!["ba%", "ba\\x"],
        "%a\\%",
        like_utf8_scalar,
        vec![true, false]
    );

Expected behavior

Additional context

[alamb]

label_issue.py automatically added labels {'arrow'} from #2743