Add Inspektor Gadget generic plugin

[joaquimrocha]

We want to have a generic Inspektor Gadget plugin for Headlamp, so users can get a quick access to all the insights given by it.
This plugin should offer a generic UI for all gadgets, with certain special cases maybe getting their own dedicated UI.

Acceptance Criteria:

• A good % of IG gadgets can be used in the plugin
• CI is set up so the plugin is tested with Headlamp automatically

Todo:

• IG has background running gadgets merged: introduce headless mode for k8s inspektor-gadget/inspektor-gadget#3587
• IG with background gadgets is released in a version of IG
• Filter UI papercuts are fixed
• remove gadget UIs for ones that do not work (or fix them)
• README should have a getting started guide on how to use it
• main.wasm handling (inline in main.js or allow including separate files) is handled by headlamp-plugin tool
• UI adapts to new IG UI-related annotations
• Publishing done by IG team (to artifact hub)

[illume]

Hey @mauriciovasquezbernal @flyth @eiffel-fl nice work in merging in

• introduce headless mode for k8s inspektor-gadget/inspektor-gadget#3587

We're using this issue to track work for the plugin. If there's any thing left to do can you please link an issue here? Or leave a comment about what's left to do here?

cc @blixtra @joaquimrocha @ashu8912

[flyth]

Thanks! There is nothing left on our side at the moment, afaik.