test(bigquery): fix OC span test (#10259)

Author: rahul2393

bigquery/go.mod

@@ -3,7 +3,7 @@ module cloud.google.com/go/bigquery
 go 1.20
 
 require (
-	cloud.google.com/go v0.113.0
+	cloud.google.com/go v0.114.0
 	cloud.google.com/go/datacatalog v1.20.1
 	cloud.google.com/go/iam v1.1.8
 	cloud.google.com/go/longrunning v0.5.7

bigquery/go.sum

@@ -1,6 +1,6 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.113.0 h1:g3C70mn3lWfckKBiCVsAshabrDg01pQ0pnX1MNtnMkA=
-cloud.google.com/go v0.113.0/go.mod h1:glEqlogERKYeePz6ZdkcLJ28Q2I6aERgDDErBg9GzO8=
+cloud.google.com/go v0.114.0 h1:OIPFAdfrFDFO2ve2U7r/H5SwSbBzEdrBdE7xkgwc+kY=
+cloud.google.com/go v0.114.0/go.mod h1:ZV9La5YYxctro1HTPug5lXH/GefROyW8PPD4T8n9J8E=
 cloud.google.com/go/auth v0.4.1 h1:Z7YNIhlWRtrnKlZke7z3GMqzvuYzdc2z98F9D1NV5Hg=
 cloud.google.com/go/auth v0.4.1/go.mod h1:QVBuVEKpCn4Zp58hzRGvL0tjRGU0YqdRTdCHM1IHnro=
 cloud.google.com/go/auth/oauth2adapt v0.2.2 h1:+TTV8aXpjeChS9M+aTtN/TjdQnzJvmzKFt//oWu7HX4=

bigquery/oc_test.go

@@ -32,7 +32,7 @@ func TestOCTracing(t *testing.T) {
 	q := client.Query("select *")
 	q.Run(ctx) // Doesn't matter if we get an error; span should be created either way
 
-	if len(te.Spans) == 0 {
+	if len(te.Spans()) == 0 {
 		t.Fatalf("Expected some spans to be created, but got %d", 0)
 	}
 }