[SLO] Add "Last 24 Hours" of source events to the SLO Detail Page for KQL Indicator

[simianhacker]

Underneath the Error Budget chart on a Custom KQL SLI, I would love to see a histogram of good events over bad events for the last 24 hours along with an embedded discover view of the last 500 "bad" events. The reason I think the last 24 hours of events is important is because that's the maximum lookback of the "Burn Rate" alert. This will make it easier to see what's going on if a user is exploring SLOs and notices a breaching SLO; they might want to start investigating right there. Same thing should be applied to the Burn Rate Alert detail page.

[elasticmachine]

Pinging @elastic/actionable-observability (Team: Actionable Observability)