[Pointcloud] Adding busses for easier better editor UX

[Fireronin]

Resolves #53

Right now first two are implemented
AzFramework::BoundsRequestBus
AzToolsFramework::EditorComponentSelectionRequestsBus

[michalpelka]

Please give a meaningful name to PR.

[Fireronin]

I did a bit of testing and cleaned up changed files

[zakmat]

Yesterday I worked with the code a little since there were some issues with the version I reviewed. I have reapplied some changes on top of yours. A final solution is satisfactory. Thanks a lot!

[michalpelka]

Code cannot be compiled with 2409.
In 2409 API for :

        AZ::Aabb GetWorldBounds() const override;
        AZ::Aabb GetLocalBounds() const override;

Some methods have are const . In 2310 not.
Except that it works nicely.

[michalpelka]

I think that is not a blocker to merge. Those gems should work with release version of o3de that currently is 2309.