Unmatched escape characters for LIKE should error

A query like:
```
select * from B WHERE B2 NOT LIKE '\'
```

should error with `22025` because the `\` is not escaping anything.

Similarly, if an ESCAPE is specifically provided, it should fail:
```
select * from B WHERE B2 NOT LIKE 'Z' ESCAPE 'Z'
```

Right now we will treat it the same as:
```
select * from B WHERE B2 NOT LIKE 'Z'
```