awaitable full clean

[troepolik]

Ability to call awaitable Full clean. To be sure it was cleared.
Could you be so kind to approve it or give me feedback what can I fix in it to merge?

[coveralls]

Coverage: 94.483% (-0.03%) from 94.511% when pulling 072e0a9 on troepolik:main into 34cf7b7 on neon-sunset:main.

[neon-sunset]

It does make sense to expose a task to wait clear completion in place. However, you will have to add public ExecuteFullEviction too.

[troepolik]

Done. But for me is not so clear how to properly run eviction. Please, look at changes closer.
Is I should call ImmediateFullEviction and is IsActive flag checked properly?

[neon-sunset]

It will require additional changes to forward either the task of Task.Run(ImmediateFullEviction<K, V>) or StaggeredFullEviction<K, V>.. However, thinking about it some more, it can probably be handled in a more graceful way by "joining" an already running full eviction if any instead of throwing/blocking and re-running/not doing anything.

For now, just remove the ExecuteFullEviction part - I will commit it separately.

[troepolik]

Done