Change:
- Hostname strategies' get_*() methods should never write to the
filesystem. They are used in check_mode by default to determine if
there is any work to be done.
Test Plan:
- New unit tests to ensure that (at least when in check_mode) the get
methods don't ever call write.
Tickets:
- Fixes#66432
Signed-off-by: Rick Elrod <rick@elrod.me>
