fix(bigquery): include user_email field when requesting job information

The field itself was added in the commit 7b18bf6,
but it was not added in the field allowlist.  Due to this missing, the function
has returned an empty string which is wrong.

bigquery/job.go

@@ -63,7 +63,7 @@ func (c *Client) JobFromProject(ctx context.Context, projectID, jobID, location
 	ctx = trace.StartSpan(ctx, "cloud.google.com/go/bigquery.JobFromProject")
 	defer func() { trace.EndSpan(ctx, err) }()
 
-	bqjob, err := c.getJobInternal(ctx, jobID, location, projectID, "configuration", "jobReference", "status", "statistics")
+	bqjob, err := c.getJobInternal(ctx, jobID, location, projectID, "user_email", "configuration", "jobReference", "status", "statistics")
 	if err != nil {
 		return nil, err
 	}