feat: Support aws_elasticache_user_group_association.timeouts and aws_elasticache_replication_group.cluster_mode

[magreenbaum]

Description

• aws_elasticache_replication_group.cluster_mode
• aws_elasticache_user_group_association.timeouts
• other enhancements/bugfixes included up to v5.71

Motivation and Context

Main:

• [Enhancement]: Ability to switch from cluster mode disabled to compatible then on hashicorp/terraform-provider-aws#35636
• r/aws_elasticache_user_group_association: add configurable timeouts hashicorp/terraform-provider-aws#38559

Other (just from version updates):

• Fix aws_elasticache_replication_group recreation on import hashicorp/terraform-provider-aws#39591
• r/aws_elasticache_replication_group: fix crash setting replicas_per_node_group hashicorp/terraform-provider-aws#38797
• resource/aws_elasticache_replication_group: Validation fixes hashicorp/terraform-provider-aws#38396
• aws_elasticache_serverless_cache hashicorp/terraform-provider-aws#38269

Breaking Changes

No.

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects

• I have executed pre-commit run -a on my pull request

[antonbabenko]

This PR is included in version 1.3.0 🎉

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.