48917 Show a deleted state instead of a generic error for stale MDM command (#49012)

**Related issue:** Resolves #48917

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.

## Testing

- [x] Added/updated automated tests

- [x] QA'd all new/changed functionality manually

For unreleased bug fixes in a release candidate, one of:

- [x] Confirmed that the fix is not expected to adversely impact load
test results

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

## Summary by CodeRabbit

* **Bug Fixes**
* The MDM command details modal now shows **“This command has been
deleted.”** instead of a generic error when a command result is removed
after the host is wiped and re-enrolled.
* The modal now uses additional stored activity context (like host
display name and request type) to render more accurate, host-specific
details for deleted commands.

* **Tests**
* Updated and added coverage to confirm the deleted-message UI and that
the generic error text no longer appears.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

changes/48917-command-details-modal-reenrolled-host

@@ -0,0 +1 @@
+- Fixed the MDM command details modal showing a generic error, instead of a clear message, for a command sent to a host that was later wiped and re-enrolled.