fix: wait for VM running after updating runStrategy to Always (#4272)

##### Short description:
- Fix `test_run_strategy_pause_unpause_vmi` failure caused by fixture
ordering change in #3847
- Add `running_vm()` call in `updated_vm_run_strategy` after setting the
strategy to `Always`, ensuring the VM is fully running before returning.
This centralizes the fix so all callers benefit.

assisted-by: Gemini
##### More details:
PR #3847 moved `start_vm_if_not_running` from function argument to
`@pytest.mark.usefixtures`, which changed the fixture execution order.
`start_vm_if_not_running` now runs **before**
`request_updated_vm_run_strategy`, so when the strategy changes to
`Always`, the VM is stopped and auto-restarts, but the test proceeds
before the VM is ready, resulting in a 409 Conflict ("VM is not
running") on pause.

##### What this PR does / why we need it:

##### Which issue(s) this PR fixes:

##### Special notes for reviewer:

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

* **Tests**
* Improved VM run-strategy tests to include an additional
synchronization when setting the strategy to ALWAYS, verifying the VM
reaches the running state.
* Retained existing test behavior for other strategies, including
verifying proper stop/start transitions where applicable.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: Sibo Wang <siwang@redhat.com>

Author: SiboWang1997

tests/virt/cluster/vm_lifecycle/test_vm_run_strategy.py

@@ -102,6 +102,9 @@ def updated_vm_run_strategy(run_strategy, vm_for_test):
             vm_for_test.stop(wait=True)
 
         ResourceEditor(patches={vm_for_test: {"spec": {"runStrategy": run_strategy}}}).update()
+
+        if run_strategy == ALWAYS:
+            vm_for_test.wait_for_specific_status(status=VirtualMachine.Status.RUNNING)
     return run_strategy