Various requested fixes

[Vernholio]

Fixed

• Service Transfer Create (POST /account/service-transfers). Included VPC in list of services that a Linode can't use.
• VPC-related fixes:
  • Corrections to nat_1_1 objects for proper support.
  • Proper IP address formatting for VPC IP addresses.
  • IP Addresses List (GET /linode/instances/{linodeId}/ips). Corrected response example to show VPC's displayed as objects in an array and added ipv4.vpc attribute to x-linode-cli-subtables.
• Domain Clone (POST /domains/{domainId}/clone). Updated regex examples to proper format.
• IP Address List (GET /linode/instances/{linodeId}/ips). Replaced requestBody with query string.
• Object Storage Bucket Contents List (GET /object-storage/buckets/{clusterId}/{bucket}/object-list). Fixed incorrect response sample.
• Parent/Child Account fixes for pagination and missing warning message.

[zliang-akamai]

Since IPAddressesVPCListResponse no longer represents the actual list API response and is now being a VPC IP object, can we consider rename it? How does IPAddressVPC sound?

Otherwise looks good to me. Thank you so much for fixing the issues in the doc!

CC: @lgarber-akamai