fix: updated condition on core.platform-mesh.io api export

[OlegErshov]

On-behalf-of: SAP aleh.yarshou@sap.com

[aaronschweig]

I see this is already quite old - is this still relevant?

[OlegErshov]

I think yes, because currently the behavior is a bit inconsistent.

1. Here in process function we process all ApiBinding resources which are not reference core.platform-mesh.io ApiExport and not kcp related ApiBindings code link
2. But the same processing check is different for finalizers. In finalizers we currently check if the ApiBinding name has platform-mesh.io or kcp.io in name code link

I think we should set our finalizers only on ApiBindings we process for consistency