TPT-4467: Change []*T to []T in all structs

[zliang-akamai]

📝 Description

Simplify things by changing all []*T to []T

✔️ How to Test

make test-int

[Copilot]

Pull request overview

This PR aims to simplify the Linodego public API models by replacing slice-of-pointers fields ([]*T) with slice-of-values ([]T) across several structs and updating tests/fixtures accordingly.

Changes:

• Updated multiple SDK structs to use []T instead of []*T (e.g., Instance.IPv4, instance backup snapshot collections, instance IP collections, NodeBalancer create config list).
• Updated unit/integration tests to account for value slices (dereferencing returned pointers before appending/assigning).
• Refreshed a number of integration VCR fixtures.

Reviewed changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
nodebalancer.go	Changes NodeBalancer create options configs from []*... to []... and adjusts JSON tags.
instances.go	Changes Instance.IPv4 from []*net.IP to []net.IP.
instance_snapshots.go	Changes backup snapshot collections from pointer slices to value slices (including Disks).
instance_ips.go	Changes several IP address collections from pointer slices to value slices.
test/unit/nodebalancers_test.go	Updates unit test to pass config create options as values rather than pointers.
test/integration/waitfor_test.go	Updates integration test to store created disks as values rather than pointers.
test/integration/vlans_test.go	Updates integration test to store created instances as values rather than pointers.
test/integration/fixtures/TestVLANs_GetIPAMAddress.yaml	Updates fixture recording for VLAN IPAM test flow (currently includes a failing instance-create interaction).
test/integration/fixtures/TestPayment_GetMissing.yaml	Updates headers/metadata in the recorded 404 payment fixture.
test/integration/fixtures/TestPayment_GetFound.yaml	Updates recorded payments list response (currently recorded as empty).
test/integration/fixtures/TestOAuthClients_Reset.yaml	Updates OAuth client reset-secret fixture recordings (IDs/timestamps/headers).
test/integration/fixtures/TestOAuthClients_List.yaml	Updates OAuth client list fixture recordings (IDs/timestamps/headers/body).
test/integration/fixtures/TestOAuthClient_GetMissing.yaml	Updates missing OAuth client fixture headers/metadata.
test/integration/fixtures/TestOAuthClient_GetFound.yaml	Updates found OAuth client fixture recordings (IDs/timestamps/headers).
test/integration/fixtures/TestAccountNotifications_List.yaml	Updates account notifications list fixture headers/metadata.
test/integration/fixtures/TestAccountMaintenances_List.yaml	Updates account maintenances list fixture headers/metadata.
test/integration/fixtures/TestAccountLogins_List.yaml	Updates account logins list fixture recordings (body expanded/updated).
test/integration/fixtures/TestAccountEvents_List.yaml	Updates account events list fixture recordings (body expanded/updated).
test/integration/fixtures/TestAccountBetaPrograms.yaml	Updates beta programs fixture (now recorded as empty list).
test/integration/fixtures/TestAccountAvailability_List.yaml	Updates account availability list fixture recordings (body expanded/updated).
test/integration/fixtures/TestAccountAvailability_Get.yaml	Updates account availability get fixture headers/metadata.
test/integration/fixtures/TestAccountAgreements_List.yaml	Updates account agreements fixture response payload/headers.

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[lgarber-akamai]

Seems to work well in my testing, nice work!