Add groups to landing_page permissions

energy_communities/security/ir.model.access.csv

 id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
-landing_page_manager,access_landing_page_manager,model_landing_page,,1,1,1,1
-landing_page_user,access_landing_page_user,model_landing_page,,1,1,1,1
\ No newline at end of file
+landing_page_admin,access_landing_page_admin,model_landing_page,energy_communities.group_admin,1,1,1,1
+landing_page_platform_manager,access_landing_page_platform_manager,model_landing_page,energy_communities.group_platform_manager,1,1,1,1
\ No newline at end of file