Make it possible to disable component for Canvas AI selection [#3549432]

Overview

Right now there are a lot of block components that the AI can pick, and also components that you might want the end-user to be able to use, but not expose as components that the AI should pick.

We currently have the CanvasAiComponentDescriptionSettingsForm, where you can override descriptions - we should add a possibility to disable components here, to have better control over what the AI can and can't pick.

Proposed resolution

Add a hide for ai checkbox to each component.
Default value, when not set is always disabled.
If enabled, hide the component in the get_component_context.

Issue fork canvas-3549432

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3549432-make-it-possible changes, plain diff MR !154
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