Rename 'ctx' parameter to 'tool_context' for consistency (google#162)

All other methods that have `tool_context` as an argument, refer to it as "tool_context" in the docstring under Args.

Co-authored-by: Hangfei Lin <[email protected]>

Author: gsarthakdev

src/google/adk/tools/base_tool.py

@@ -73,7 +73,7 @@ async def run_async(
 
     Args:
       args: The LLM-filled arguments.
-      ctx: The context of the tool.
+      tool_context: The context of the tool.
 
     Returns:
       The result of running the tool.