repos: add ListExternalRepoSpecs to only collect ExternalRepoSpec
Created by: unknwon
Fetching all fields of all repos just for fields of api.ExternalRepoSpec
is wasteful, so adds a dedicated method to do this job.
Part of #12699
Created by: unknwon
Fetching all fields of all repos just for fields of api.ExternalRepoSpec
is wasteful, so adds a dedicated method to do this job.
Part of #12699