Add new API endpoints for push mirrors management (#19841)

- Add a new push mirror to specific repository
- Sync now ( send all the changes to the configured push mirrors )
- Get list of all push mirrors of a repository
- Get a push mirror by ID
- Delete push mirror by ID

Signed-off-by: Mohamed Sekour <mohamed.sekour@exfo.com>
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: zeripath <art27@cantab.net>

modules/context/repo.go

@@ -393,7 +393,7 @@ func repoAssignment(ctx *Context, repo *repo_model.Repository) {
 		}
 	}
 
-	pushMirrors, err := repo_model.GetPushMirrorsByRepoID(repo.ID)
+	pushMirrors, _, err := repo_model.GetPushMirrorsByRepoID(ctx, repo.ID, db.ListOptions{})
 	if err != nil {
 		ctx.ServerError("GetPushMirrorsByRepoID", err)
 		return