Stack multiple identical printed messages together in the editor Output panel

[Zireael07]

Describe the project you are working on:
N/A (generic issue)

Describe the problem or limitation you are having in your project:
Printing the same thing over and over (e.g. to make sure the AIs are active)

Describe the feature / enhancement and how it helps to overcome the problem or limitation:
The console is less flooded and therefore performs better in terms of speed.

Describe how your proposal will work, with code, pseudocode, mockups, and/or diagrams:
Mockup in original issue.

If this enhancement will not be used often, can it be worked around with a few lines of script?:
Nope.

Is there a reason why this should be core and not an add-on in the asset library?:
I don't think it can be worked around outside of core (the workaround given in original issue is for server-side projects, but it's needed for non-server projects, too)

Original issue: godotengine/godot#19121