Replace table in SavedObjectFinder by EuiListGroup

[timroes]

As pointed out by @cchaos it would be better if our SavedObjectFinder would use a list representation instead of a table (since it's actually just one column with a title). Therefore we can use the EuiListGroup component, which unfortunately lacks pagination and sorting which we would need to build within the SavedObjectFinder ourselves.

I still think that component might be the better fit and we could exchange it.

cc @flash1293

[elasticmachine]

Pinging @elastic/kibana-app

[flash1293]

Closed by #31400