feat: Added managed storage KMS configuration

[hp197]

Description

The changes primarily focus on adding support for managed storage configuration and updating the required AWS provider version.

Managed Storage Configuration:

• Added a dynamic block for managed_storage_configuration in the aws_ecs_cluster resource to handle optional managed storage settings, including kms_key_id and fargate_ephemeral_storage_kms_key_id.

Provider Version Update:

• Updated the required version of the AWS provider from >= 4.66.1 to >= 5.59.0 to ensure compatibility with empheral storage configuration.

Fixes issue #258

[hp197]

Yes yes, I do know about #217, but it would be nice to have this before the major module upgrade.

[ceditpro]

Should be interesting to merge this PR who add the kms feature encryption for the storage

[bryantbiggs]

managed_storage_configuration is only available starting on v5.59.0 and this module only supports up to v4.x which means this has to go in with or after #258