Fix column ip_address in table gcp_compute_forwarding_rule and gcp_compute_global_forwarding_rule for IPv6 CIDR values

[karanpopat]

Example query results

Results

> select name, ip_address from gcp_compute_forwarding_rule
+------------------------------------+---------------------------------+
| name                               | ip_address                      |
+------------------------------------+---------------------------------+
| gke-cluster-1-e7df1409-95479c15-pe | 10.128.0.22                     |
| test-fr                            | 2600:1900:4000:45f3:8000:1::/96 |
+------------------------------------+---------------------------------+

[misraved]

@karanpopat do other tables with IP address column type need an update?

[karanpopat]

@misraved i checked, we have one in this table as well - gcp_compute_global_forwarding_rule