Experiment History view

[freshstrangemusic]

There is planned work to save historical records of metrics so that they can be shown in about:glean. We could use this historical data to recreate enrollment timelines in nimbus-devtools so we can see when and why enrollment or unenrollment happened

See-also: https://bugzilla.mozilla.org/show_bug.cgi?id=2054516

[freshstrangemusic]

We are also going to be recording enrollment status in the enrollment database as of https://bugzilla.mozilla.org/show_bug.cgi?id=2063424 so we could also leverage that mechanism.