Logical expressions and non-singular filter queries

[jg-rp]

We are erroneously raising a JSONPathSyntaxError when non-singular filter queries appear in logical expressions.

Example:

import jsonpath

data = [
  {
    "a": "b",
    "d": "e"
  },
  {
    "b": "c",
    "d": "f"
  }
]

query = "$[?@..* && @.b]"
jsonpath.findall(query, data)
# JSONPathSyntaxError: non-singular query is not comparable, line 1, column 8

This would be the correct behaviour in a comparison expression, as non-singular queries can not be compared, but we are applying the same logic to logical expressions, which is bad.