More db.DefaultContext refactor (#27265)

Part of #27065

This PR touches functions used in templates. As templates are not static
typed, errors are harder to find, but I hope I catch it all. I think
some tests from other persons do not hurt.

models/git/commit_status.go

@@ -514,7 +514,7 @@ func ConvertFromGitCommit(ctx context.Context, commits []*git.Commit, repo *repo
 			user_model.ValidateCommitsWithEmails(ctx, commits),
 			repo.GetTrustModel(),
 			func(user *user_model.User) (bool, error) {
-				return repo_model.IsOwnerMemberCollaborator(repo, user.ID)
+				return repo_model.IsOwnerMemberCollaborator(ctx, repo, user.ID)
 			},
 		),
 		repo,