Update 11.1 platform to 11.x platform

For now, until we are correctly able to manage Nuxeo continuous release; we need to remove any dependency between Platform fast release cycle (11.1, 11.2, ...) which are internal releases for now

We should update registries to display 11.x, but most importantly we need to workaround package platform dependency to `server-11.*`.

See: com.nuxeo.studio.core.build.StudioPackageBuilder#build(java.lang.String, java.lang.String, java.lang.String, com.nuxeo.studio.core.api.model.appdef.ApplicationDefinition, java.io.File, java.lang.String)