Use repo as of renderctx's member rather than a repoPath on metas (#29222)

Use a `gitrepo.Repository` in the markup's RenderContext but not store
the repository's path.

routers/web/repo/release.go

@@ -119,6 +119,7 @@ func getReleaseInfos(ctx *context.Context, opts *repo_model.FindReleasesOptions)
 			},
 			Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 			GitRepo: ctx.Repo.GitRepo,
+			Repo:    ctx.Repo.Repository,
 			Ctx:     ctx,
 		}, r.Note)
 		if err != nil {