gh-103449: Fix a bug in dataclass docstring generation

[sobolevn]

Now, we can use a default signature by catching some of the exceptions.
As the second option - we can catch all exceptions here.

• Issue: [dataclasses] Exception on __doc__ generation, when object signature cannot be fetched #103449

[Eclips4]

Thanks for fix, Nikita!
Also, this reproducible on 3.11, so, I think this should be merged to 3.11 and current branch.
(Although, reproducible on 3.9 & 3.10, but it's not a security fix)

[Eclips4]

However, functional of Test.__doc__ (where Test is a dataclass) is not documented.

[miss-islington]

Thanks @sobolevn for the PR, and @carljm for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

[miss-islington]

Sorry @sobolevn and @carljm, I had trouble checking out the 3.11 backport branch.
Please retry by removing and re-adding the "needs backport to 3.11" label.
Alternatively, you can backport using cherry_picker on the command line.
cherry_picker b57f55c23e15654e9dd77680ff1462603e360b76 3.11

[miss-islington]

Thanks @sobolevn for the PR, and @carljm for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

[bedevere-bot]

GH-103599 is a backport of this pull request to the 3.11 branch.