Auto merge of #29647 - mrobinson:catch-more-notification-exceptions, r=jdm

Catch more exceptions when delivering build notifications

It seems that catching ImportError isn't enough, so we must catch any type of exception when trying to deliver a build notification.

Fixes #29645.

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---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because they fix a small build infrastructure issue.

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python/servo/build_commands.py

@@ -743,9 +743,8 @@ class MachCommands(CommandBase):
                         {"transient": True},  # hints
                         -1  # timeout
                     )
-                except ImportError:
-                    print("[Warning] Could not generate notification: "
-                          "Optional Python module 'dbus' is not installed.",
+                except Exception as exception:
+                    print(f"[Warning] Could not generate notification: {exception}",
                           file=sys.stderr)
                 return True