Fix template usage

[CedNaru]

Currently, the editor is not able to automatically use our templates because there is a mismatch between its name and the name of the template. We have so far build our custom editor using the same "name" as the official godot, which creates a conflict.

I made the changes so that the next release is going to use the name 4.3.stable.jvm.0.11.0.
We can't change the prefix 4.3-stable unless we directly Godot files, but we can append anything we want to it, so I picked jvm.ourcurrentversion

Without that change, users can't properly export without manually setting a release and a debug export template in their export preset.
This issue didn't happened before because we were using the same name as the official template for ours. I changed last before the last release so people could have both the official and the koltin versions of a template without name conflict. I just didn't realise that the editor name had to exactly the template to work..

So it's either this change or we revert all names to the same as the official release, preventing users to use both Kotlin and non kotlin versions of the templates.

Note that because, this PR changes the names of the build, opening the template manager create this warning:

It doesn't prevent anything, it's just an annoying warning because the editor is hardcoded to search the official godot website.

I created a proposal that would allow us to set a link to our GitHub, so users can download templates directly from there:
godotengine/godot-proposals#10894

[chippmann]

Please also add why the warning appears to the docs and possibly link to your proposal as well as part of the explanation.

[piiertho]

Why CI is failing on test export ?

[chippmann]

One nit. I leave it up to you if you want to change that or not.