status: fix TestTenantStatusAPI test

Previously, this test would use a single connection, cancel it, and
then use the connection to verify the cancellation.

The test is adjusted here to use two separate sessions, one to cancel
for testing, and another to observe the cancellation.

Resolves: cockroachdb#125404
Epic: None

Release note: None

pkg/ccl/serverccl/statusccl/tenant_status_test.go

@@ -1102,8 +1102,16 @@ func selectClusterSessionIDs(t *testing.T, conn *sqlutils.SQLRunner) []string {
 
 func testTenantStatusCancelSession(t *testing.T, helper serverccl.TenantTestHelper) {
 	// Open a SQL session on tenant SQL pod 0.
-	sqlPod0 := helper.TestCluster().TenantConn(0)
-	sqlPod0.Exec(t, "SELECT 1")
+	ctx := context.Background()
+	// Open two different SQL sessions on tenant SQL pod 0.
+	sqlPod0 := helper.TestCluster().TenantDB(0)
+	sqlPod0SessionToCancel, err := sqlPod0.Conn(ctx)
+	require.NoError(t, err)
+	sqlPod0SessionForIntrospection, err := sqlPod0.Conn(ctx)
+	require.NoError(t, err)
+	_, err = sqlPod0SessionToCancel.ExecContext(ctx, "SELECT 1")
+	require.NoError(t, err)
+	introspectionRunner := sqlutils.MakeSQLRunner(sqlPod0SessionForIntrospection)
 
 	// See the session over HTTP on tenant SQL pod 1.
 	httpPod1 := helper.TestCluster().TenantAdminHTTPClient(t, 1)
@@ -1122,7 +1130,7 @@ func testTenantStatusCancelSession(t *testing.T, helper serverccl.TenantTestHelp
 	// See the session over SQL on tenant SQL pod 0.
 	sessionID := hex.EncodeToString(session.ID)
 	require.Eventually(t, func() bool {
-		return strings.Contains(strings.Join(selectClusterSessionIDs(t, sqlPod0), ","), sessionID)
+		return strings.Contains(strings.Join(selectClusterSessionIDs(t, introspectionRunner), ","), sessionID)
 	}, 5*time.Second, 100*time.Millisecond)
 
 	// Cancel the session over HTTP from tenant SQL pod 1.
@@ -1134,7 +1142,7 @@ func testTenantStatusCancelSession(t *testing.T, helper serverccl.TenantTestHelp
 	// No longer see the session over SQL from tenant SQL pod 0.
 	// (The SQL client maintains an internal connection pool and automatically reconnects.)
 	require.Eventually(t, func() bool {
-		return !strings.Contains(strings.Join(selectClusterSessionIDs(t, sqlPod0), ","), sessionID)
+		return !strings.Contains(strings.Join(selectClusterSessionIDs(t, introspectionRunner), ","), sessionID)
 	}, 5*time.Second, 100*time.Millisecond)
 
 	// Attempt to cancel the session again over HTTP from tenant SQL pod 1, so that we can see the error message.