Simplify folder controller schema, change folder uid if needed

[weisdd]

Several improvements for folder controller:

• I think there isn't much need in offering raw json for folders. - Their API is very limited (docs), we can simplify operator's code (no need to care about errors in json + no need to decode it) and UX a bit by exposing custom title in a separate field.
• Requeue folder sync in case of errors;
• Reorganize onFolderCreated a bit to make room for further introduction of permissions (those will be in json);
• Replace folder uid if needed (e.g. folder was created outside of operator or through dashboard controller => exists with different uid).

[NissesSenap]

I will take a deeper look tomorrow. I think we also should update some docs to match the changes. Or didn't we add any folder example?

[weisdd]

@NissesSenap unless I overlooked them, we don't have any examples with folders yet. I thought of adding one after permissions are implemented. For basic permissions (just raw json), I have some code already, it's just a bit of extra code on top of the changes from this PR, so I'll park another PR till this one is discussed/reviewed :)

[pb82]

@weisdd verified and works, folders get created. Manifests need to be udpated though (make generate, make manifests & make bundle).

[NissesSenap]

@pb82 if we want to enforce that we should do it through CI. We let's add that in a separate PR and we can fix all the generation there.

[weisdd]

@pb82 Seems like bundle is not part of test in Makefile, we should add it.
Ran make bundle manually, everything should be in sync now.

[pb82]

Thanks @weisdd ! @NissesSenap yes, it would be good to make this part of the pipeline.