Chopping - Revise deletion of plants

[Kexanone]

When merged this pull request will:

• Move code from game mode to a game mode component
• Use entity IDs instead of positions

Background:

• The array that contains all deleted entities can be fairly large, so we prefer to not replicate it when not needed. The problem is that there is a high chance that other mods will call Replication.BumpMe on the game mode entity, so it's better to move our RplProp to our own component to have better control over its replication.
• Replication of array<EntityID> is currently broken (see https://feedback.bistudio.com/T186903), so we have to use array<int> as a workaround for now.

[veteran29]

LGTM, I feel the code could be a bit more readable if we would introduce a custom container class for the Entity ID instead of the "bits" array.

[Kexanone]

LGTM, I feel the code could be a bit more readable if we would introduce a custom container class for the Entity ID instead of the "bits" array.

Good idea. There's in fact a high chance that if put the EntityID in a custom container, replication could work without splitting it into two ints.