…ton to alerts table (elastic#195736)

## Summary

Forwards the reload request from the Stack Management rule detail page
`🔄 Refresh` button to the alerts table.

## To verify

1. Create a Stack rule that fires alerts
2. Visit that rule's detail page
3. Check that the `🔄 Refresh` button correctly refreshes the alerts
table (i.e. by changing the rule params and checking that the alerts
update accordingly)

## References

Fixes elastic#188405, elastic#183155

(cherry picked from commit 6a0ad10)