refactor: streamline tracing condition checks and clean up deprecated warnings (#3358)

This commit simplifies the conditions for enabling tracing in both the Crew and Flow classes by removing the redundant call to `on_first_execution_tracing_confirmation()`. Additionally, it removes deprecated warning filters related to Pydantic in the KnowledgeStorage and RAGStorage classes, improving code clarity and maintainability.

src/crewai/knowledge/storage/knowledge_storage.py

@@ -11,7 +11,6 @@ import chromadb.errors
 from chromadb.api import ClientAPI
 from chromadb.api.types import OneOrMany
 from chromadb.config import Settings
-from pydantic.warnings import PydanticDeprecatedSince211
 import warnings
 
 from crewai.knowledge.storage.base_knowledge_storage import BaseKnowledgeStorage
@@ -91,7 +90,6 @@ class KnowledgeStorage(BaseKnowledgeStorage):
         # TODO: Remove this once we upgrade chromadb to at least 1.0.8.
         warnings.filterwarnings(
             "ignore",
-            category=PydanticDeprecatedSince211,
             message=r".*'model_fields'.*is deprecated.*",
             module=r"^chromadb(\.|$)",
         )