d/aws_vpc multiple ipv6_cidr_block_associations

[danquack]

Rollback Plan

If a change needs to be reverted, we will publish an updated version of the library.

Changes to Security Controls

Are there any changes to security controls (access controls, encryption, logging) in this pull request? If so, explain.

Description

Allow of access to all ipv6_cidr_block_associations

Relations

Closes #44733

References

Output from Acceptance Testing

% make testacc TESTS=TestAccVPCDataSource_IPv6CIDRBlockAssociations_multiple PKG=ec2                
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
make: Running acceptance tests on branch: 🌿 vpc-ipv6 🌿...
TF_ACC=1 go1.25.8 test ./internal/service/ec2/... -v -count 1 -parallel 20 -run='TestAccVPCDataSource_IPv6CIDRBlockAssociations_multiple'  -timeout 360m -vet=off
2026/03/13 10:20:40 Creating Terraform AWS Provider (SDKv2-style)...
2026/03/13 10:20:40 Initializing Terraform AWS Provider (SDKv2-style)...
=== RUN   TestAccVPCDataSource_IPv6CIDRBlockAssociations_multiple
=== PAUSE TestAccVPCDataSource_IPv6CIDRBlockAssociations_multiple
=== CONT  TestAccVPCDataSource_IPv6CIDRBlockAssociations_multiple
--- PASS: TestAccVPCDataSource_IPv6CIDRBlockAssociations_multiple (55.59s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/ec2        61.243s

[github-actions]

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[github-actions]

✅ Thank you for correcting the previously detected issues! The maintainers appreciate your efforts to make the review process as smooth as possible.

[danquack]

Not sure if this is desired, but feel a user could get this by looking at the array themselves in future versions. Happy to remove these.

[danquack]

There's more fields, but I grabbed a copy of ipv4 associations to align. Notably missing:Attributes