Reference: #13170
Reference: #13171

Output from acceptance testing in OTL account:

```
--- PASS: TestAccDataSourceAwsSubnet_basic (25.67s)
--- PASS: TestAccDataSourceAwsSubnet_ipv6ByIpv6CidrBlock (46.37s)
--- PASS: TestAccDataSourceAwsSubnet_ipv6ByIpv6Filter (51.83s)

--- PASS: TestAccAWSSubnet_availabilityZoneId (29.12s)
--- PASS: TestAccAWSSubnet_basic (31.04s)
--- PASS: TestAccAWSSubnet_CustomerOwnedIpv4Pool (63.80s)
--- PASS: TestAccAWSSubnet_disappears (21.79s)
--- PASS: TestAccAWSSubnet_enableIpv6 (79.03s)
--- PASS: TestAccAWSSubnet_ignoreTags (45.48s)
--- PASS: TestAccAWSSubnet_ipv6 (90.26s)
--- PASS: TestAccAWSSubnet_MapCustomerOwnedIpOnLaunch (49.07s)
--- PASS: TestAccAWSSubnet_outpost (47.45s)
--- PASS: TestAccAWSSubnet_tags (68.74s)
```