[Alerting UI] Add visual indicator of the next request delay between rules enable/disable switch clicking.

[YulNaumenko]

Currently we have a Switch EUI control for changing Rule enabled property in the Rules list and Details pages.
If the user interacting (clicking) fast on the switch button, too many request are sent to the server, which could cause the Kibana errors (crash sometimes):

We might change the UX by disabling the quick clicks, but with saving UI responsiveness, because in case if we will disable switch till the server respond - this is also a bad UX (at least we should provide a enough visible spinner that something happening)

Follow up on the PR

[elasticmachine]

Pinging @elastic/kibana-alerting-services (Team:Alerting Services)

[pmuellr]

I think there's a bug in alerting here, just opened #106292

I also think that we probably do want to disable editing the alert until the disable / enable returns.

But we might want to keep this open, to help debug the underlying alerting problem, since it makes for a simple repro :-)