purge: prevent a silly crash with --confirm --files if --files is passed, there was no directory to checks and `msg` was undefined. This is now fixed and tested.

auto-upgrade: add an option to silence the safe-mismatch message For well tested case, the message can get in the way, so we add a way to disable it.

auto-upgrade: add an option to silence the tracked-hint message For well tested case, the message can get in the way, so we add a way to disable it.

auto-upgrade: add an option to silence the dirstate-v2 message For well tested case, the message can get in the way, so we add a way to disable it.

auto-upgrade: rename a variable to match the actual content This was the result of a copy paste.

auto-upgrade: add an option to silence the share-safe message For well tested case, the message can get in the way, so we add a way to disable it.

auto-upgrade: add a test that will host "quiet" testing We will add options to suppress the message in the coming changeset. The changes will be clearer if the full test is already in place.

rust-status: don't trigger dirstate v1 rewrite when only v2 data is changed The assumption that we need to rewrite (or append to) the dirstate if the ignore pattern hash has changed or if any cached directory mtimes have changed is only valid when using dirstate-v2. In dirstate-v1, neither of these things are written to disk.

bundlespec: check the `obsolescence` value before adding the caps This does not really matters as the logic to decide wether or not adding the part is correct and elsewhere. However this seems like a good idea to align this logic witht he semantic of the option.

bundlespec: handle the presence of obsmarker part This make `hg debugbundle --spec` more informative about extra part in the bundle.