Consider extending `suppressible-exception` (`SIM105`) to multi-line `try` blocks

```py
try: # error
...
except Exception:
pass

try: # no error
...
...
except Exception:
pass
```
[playground](https://play.ruff.rs/0ae2bc17-7268-450b-b602-298728301078)

Start by reproducing the two examples in the linked Ruff playground and inspect how SIM105 currently treats each try block. Determine the intended distinction between the one-line and multi-line cases, then add coverage for the agreed behavior and verify the linter output; the issue does not name source files or tests.

Written by the indexing model from the issue text.