[POC] Go-VCR: Wrap state change data structures

[jar-b]

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

A proof-of-concept for wrapping state change data structures from the Terraform Plugin-SDK V2 retry package with logic to enable replayed VCR acceptance tests. Specifically, when VCR is enabled the delay and poll interval between state change checks is reduced to allow replayed interactions to quickly pass through the CRUD handler's waiting logic. This can significantly reduce test execution times for resources which are slow to provision. For example, ElastiCache clusters:

Standard:

--- PASS: TestAccElastiCacheCluster_Engine_redis (681.65s)
--- PASS: TestAccElastiCacheCluster_Engine_redis_v5 (681.67s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/elasticache        687.358s

Replayed Interaction:

--- PASS: TestAccElastiCacheCluster_Engine_redis_v5 (10.49s)
--- PASS: TestAccElastiCacheCluster_Engine_redis (10.50s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/elasticache        16.336s

Relations

Relates #25602
Relates #43039 (an alternative implementation)

Output from Acceptance Testing

Prototyping with the elasticache service, test execution times for basic cluster resource configurations were reduced to ~10 seconds.

% VCR_MODE=REPLAY_ONLY VCR_PATH=/Users/jaredbaker/development/_worktrees/f-vcr-status-check/testdata/ make testacc PKG=elasticache TESTS=TestAccElastiCacheCluster_Engine_redis
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.24.3 test ./internal/service/elasticache/... -v -count 1 -parallel 20 -run='TestAccElastiCacheCluster_Engine_redis'  -timeout 360m -vet=off
2025/06/09 16:14:19 Creating Terraform AWS Provider (SDKv2-style)...
2025/06/09 16:14:19 Initializing Terraform AWS Provider (SDKv2-style)...

--- PASS: TestAccElastiCacheCluster_Engine_redis_v5 (10.49s)
--- PASS: TestAccElastiCacheCluster_Engine_redis (10.50s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/elasticache        16.336s

[github-actions]

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[jar-b]

Closing in favor of #43039

[github-actions]

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[github-actions]

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