Misleading warning for progress callback exceptions

[lorenzocesconetto]

Describe the bug
Currently a misleading warning is logged when a progress callback raises an exception.
It states that it "Failed to validate notification".
I've already issued a PR to fix it: #775

To Reproduce

async def progress_cb(progress: float, total: float | None, message: str | None):
 raise RuntimeError("Cannot divide by zero.")

result = await self.session.call_tool(
 tool_name,
 arguments,
 progress_callback=progress_cb,
 )

Expected behavior
Indicate to the developer that his callback threw an exception.

[ivanbelenky]

I have no saying in anything but your PR looks good to me.

[felixweinberger]

Closing this as #775 has been landed.