feat(cockpit): delete cockpit plan data source (breaking) (scaleway#3092)

* feat(cockpit): delete cockpit plan data source

* delete cassette

* fix build

Author: jremy42

docs/data-sources/cockpit_plan.md

@@ -259,7 +259,6 @@ func Provider(config *Config) plugin.ProviderFunc {
 				"scaleway_block_snapshot":                      block.DataSourceSnapshot(),
 				"scaleway_block_volume":                        block.DataSourceVolume(),
 				"scaleway_cockpit":                             cockpit.DataSourceCockpit(),
-				"scaleway_cockpit_plan":                        cockpit.DataSourcePlan(),
 				"scaleway_cockpit_source":                      cockpit.DataSourceCockpitSource(),
 				"scaleway_config":                              scwconfig.DataSourceConfig(),
 				"scaleway_container":                           container.DataSourceContainer(),