[mod] pylint all files with one profile / drop PYLINT_SEARXNG_DISABLE_OPTION

In the past, some files were tested with the standard profile, others with a
profile in which most of the messages were switched off ... some files were not
checked at all.

- ``PYLINT_SEARXNG_DISABLE_OPTION`` has been abolished
- the distinction ``# lint: pylint`` is no longer necessary
- the pylint tasks have been reduced from three to two

  1. ./searx/engines -> lint engines with additional builtins
  2. ./searx ./searxng_extra ./tests -> lint all other python files

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/query.py

@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
+# pylint: disable=invalid-name, missing-module-docstring, missing-class-docstring
 
 from abc import abstractmethod, ABC
 import re
@@ -191,7 +192,7 @@ class BangParser(QueryPartParser):
 
     def _parse(self, value):
         # check if prefix is equal with engine shortcut
-        if value in engine_shortcuts:
+        if value in engine_shortcuts:  # pylint: disable=consider-using-get
             value = engine_shortcuts[value]
 
         # check if prefix is equal with engine name