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.