UPDATE: @noahtalerman: For the following quick win:
- https://github.com/fleetdm/fleet/issues/42054
## Summary
- Always use plural forms ("reports", "hosts", "policies") in delete
modal titles and success/error flash messages, regardless of selection
count
- Remove conditional singular/plural logic from delete reports, delete
hosts, and delete policies flows
- Fix DeleteHostModal body text to properly pluralize "host"/"hosts"
based on count while dropping "the record of" for cleaner messaging