Migrate non-angular plugins to new platform toasts

[spalger]

With #21772 the <EuiGlobalToastList/> is now injected in every page and as such we should remove usage of the <EuiGlobalToastList/> from other plugins that previously needed to supply it themselves because they were not using angular. If two <EuiGlobalToastList/>s are rendered in the same page the toasts will overlap each other so we need to unify our usage.

Based on my searches APM [1] [2] seems to be the only plugin that will need to be updated, but pinging people related to other plugins just to make sure.

@w33ble @weltenwort @sqren

[sorenlouv]

Will these docs need updating or is the API unchanged?
https://github.com/elastic/kibana/blob/2b27fb1c5f43660e9f723594ae1489e68577530a/src/ui/public/notify/toasts/TOAST_NOTIFICATIONS.md

[spalger]

That API is unchanged and is currently the easiest way to integrate with the toastNotifications

[w33ble]

You're saying that as long as we don't use the EuiGlobalToastList component ourselves, we're good? Because canvas does not use that.

[spalger]

Yep, thanks @w33ble

[sorenlouv]

@spalger This should be solved by #22056