Add elasticache ip discovery

[jms200]

Description

Adds the ip_discovery parameter to elasticache cluster creation that is now supported on Redis 6.2 and Memcached engine version 1.6.6 on all instances built on the Nitro system.

Also seen in the official announcement here: https://aws.amazon.com/about-aws/whats-new/2022/11/amazon-elasticache-supports-ipv6/

Relations

Closes #27700

References

Announcement: https://aws.amazon.com/about-aws/whats-new/2022/11/amazon-elasticache-supports-ipv6/
API: https://docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_CreateCacheCluster.html

Output from Acceptance Testing

$ make testacc TESTS=TestAccXXX PKG=ec2

...

[github-actions]

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[github-actions]

Welcome @jms200 👋

It looks like this is your first Pull Request submission to the Terraform AWS Provider! If you haven’t already done so please make sure you have checked out our CONTRIBUTOR guide and FAQ to make sure your contribution is adhering to best practice and has all the necessary elements in place for a successful approval.

Also take a look at our FAQ which details how we prioritize Pull Requests for inclusion.

Thanks again, and welcome to the community! 😃

[jms200]

Working with @bschaatsbergen to run tests soon.

[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccElastiCacheCluster_Engine_redis\|TestAccElastiCacheCluster_ipDiscovery' PKG=elasticache ACCTEST_PARALLELISM=2
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/elasticache/... -v -count 1 -parallel 2  -run=TestAccElastiCacheCluster_Engine_redis\|TestAccElastiCacheCluster_ipDiscovery -timeout 180m
=== RUN   TestAccElastiCacheCluster_Engine_redis
=== PAUSE TestAccElastiCacheCluster_Engine_redis
=== RUN   TestAccElastiCacheCluster_Engine_redis_v5
=== PAUSE TestAccElastiCacheCluster_Engine_redis_v5
=== RUN   TestAccElastiCacheCluster_ipDiscovery
=== PAUSE TestAccElastiCacheCluster_ipDiscovery
=== CONT  TestAccElastiCacheCluster_Engine_redis
=== CONT  TestAccElastiCacheCluster_ipDiscovery
--- PASS: TestAccElastiCacheCluster_Engine_redis (522.11s)
=== CONT  TestAccElastiCacheCluster_Engine_redis_v5
--- PASS: TestAccElastiCacheCluster_ipDiscovery (527.74s)
--- PASS: TestAccElastiCacheCluster_Engine_redis_v5 (447.05s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/elasticache	974.021s

[github-actions]

This functionality has been released in v4.41.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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