[fix] fix venv_dev and multiprocess lib usage

Many functions and members of `multiprocess` lib are exposed
dynamically. For this reason pylint is not able to tell what
members this lib has (e.g. `multiprocess.Value()`. So these
pylint reports have been suppressed.

Another purpose of this commit is to make "superset" relationship
for venv_dev: if a CodeChecker developer installs venv_dev, then
the content of venv should always be installed. venv_dev just
extends them. `multiprocess` was a counterexample for this relationship:
it was installed only by `venv` and not `venv_dev`. Such a
mistake in the organization of requirements.txt files results
missing libraries for developers.

codechecker_common/skiplist_handler.py

@@ -103,12 +103,6 @@ def should_skip(self, source):
                 return sign == '-'
         return False
 
-    def __call__(self, source_file_path: str) -> bool:
-        """
-        Check if the given source should be skipped.
-        """
-        return self.should_skip(source_file_path)
-
 
 class SkipListHandlers(list):
     def should_skip(self, file_path: str):
@@ -117,11 +111,3 @@ def should_skip(self, file_path: str):
         handler.
         """
         return any(handler.should_skip(file_path) for handler in self)
-
-    # FIXME: eliminate this function and use should_skip instead of this.
-    # Do the same in the SkipListHandler class above.
-    def __call__(self, file_path: str) -> bool:
-        """
-        Check if the given source should be skipped.
-        """
-        return self.should_skip(file_path)

tools/report-converter/codechecker_report_converter/report/__init__.py

@@ -14,15 +14,16 @@
 import logging
 import os
 
-from typing import Callable, Dict, List, Optional, Set
+from typing import Callable, Dict, List, Optional, Protocol, Set
 
 from .. import util
 
 
 LOG = logging.getLogger('report-converter')
 
 
-SkipListHandlers = Callable[[str], bool]
+class SkipListHandlers(Protocol):
+    should_skip: Callable[[str], bool]
 
 
 InvalidFileContentMsg: str = \
@@ -473,7 +474,7 @@ def skip(self, skip_handlers: Optional[SkipListHandlers]) -> bool:
         if not skip_handlers:
             return False
 
-        return skip_handlers(self.file.original_path)
+        return skip_handlers.should_skip(self.file.original_path)
 
     def to_json(self) -> Dict:
         """ Creates a JSON dictionary. """