chore: apply and fix flake8-bugbear lint rules (#4496)

api/core/model_runtime/callbacks/base_callback.py

-from abc import ABC
 from typing import Optional
 
 from core.model_runtime.entities.llm_entities import LLMResult, LLMResultChunk
 }
 
 
-class Callback(ABC):
+class Callback:
     """
     Base class for callbacks.
     Only for LLM.

api/core/tools/tool_manager.py

 
             :return: the label of the tool
         """
-        cls._builtin_tools_labels
         if len(cls._builtin_tools_labels) == 0:
             # init the builtin providers
             cls.load_builtin_providers_cache()

api/core/workflow/nodes/tool/tool_node.py

         parameters = self._generate_parameters(variable_pool, node_data)
         # get tool runtime
         try:
-            self.app_id
             tool_runtime = ToolManager.get_workflow_tool_runtime(self.tenant_id, self.app_id, self.node_id, node_data)
         except Exception as e:
             return NodeRunResult(

api/pyproject.toml

 [tool.ruff.lint]
 ignore-init-module-imports = true
 select = [
+    "B", # flake8-bugbear rules
     "F", # pyflakes rules
-    "I001", # unsorted-imports
-    "I002", # missing-required-import
+    "I", # isort rules
     "UP",   # pyupgrade rules
     "RUF019", # unnecessary-key-check
 ]
     "F841", # unused-variable
     "UP007", # non-pep604-annotation
     "UP032", # f-string
+    "B005", # strip-with-multi-characters
+    "B006", # mutable-argument-default
+    "B007", # unused-loop-control-variable
+    "B026", # star-arg-unpacking-after-keyword-arg
+    "B904", # raise-without-from-inside-except
+    "B905", # zip-without-explicit-strict
 ]
 
 [tool.ruff.lint.per-file-ignores]