[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/metrics/error_recorder.py

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# pylint: disable=missing-module-docstring, invalid-name
+
 import typing
 import inspect
 from json import JSONDecodeError
@@ -16,7 +19,7 @@ from searx.engines import engines
 errors_per_engines = {}
 
 
-class ErrorContext:
+class ErrorContext:  # pylint: disable=missing-class-docstring
 
     __slots__ = (
         'filename',
@@ -29,7 +32,9 @@ class ErrorContext:
         'secondary',
     )
 
-    def __init__(self, filename, function, line_no, code, exception_classname, log_message, log_parameters, secondary):
+    def __init__(  # pylint: disable=too-many-arguments
+        self, filename, function, line_no, code, exception_classname, log_message, log_parameters, secondary
+    ):
         self.filename = filename
         self.function = function
         self.line_no = line_no
@@ -39,7 +44,7 @@ class ErrorContext:
         self.log_parameters = log_parameters
         self.secondary = secondary
 
-    def __eq__(self, o) -> bool:
+    def __eq__(self, o) -> bool:  # pylint: disable=invalid-name
         if not isinstance(o, ErrorContext):
             return False
         return (
@@ -109,7 +114,7 @@ def get_request_exception_messages(
     status_code = None
     reason = None
     hostname = None
-    if hasattr(exc, '_request') and exc._request is not None:
+    if hasattr(exc, '_request') and exc._request is not None:  # pylint: disable=protected-access
         # exc.request is property that raise an RuntimeException
         # if exc._request is not defined.
         url = exc.request.url
@@ -123,7 +128,7 @@ def get_request_exception_messages(
     return (status_code, reason, hostname)
 
 
-def get_messages(exc, filename) -> typing.Tuple:
+def get_messages(exc, filename) -> typing.Tuple:  # pylint: disable=too-many-return-statements
     if isinstance(exc, JSONDecodeError):
         return (exc.msg,)
     if isinstance(exc, TypeError):