feat!: Update provider to `v4.x`, add new attributes from `v4.x`, change `user_data_base64` to `user_data`

[bryantbiggs]

Description

• Update provider to v4.x to support attributes added
• Change user_data_base64 to user_data to match resource name used
• Add capacity_reservation_resource_group_arn attribute to capacity_reservation_specification.capacity_reservation_target
• Add ipv4_prefix_count, ipv4_prefixes, ipv6_prefix_count, ipv6_prefixes to network_interfaces
• Add private_dns_name_options block and its attributes
• Add instance_reuse_policy block and its attributes to warm_pool

Motivation and Context

• Updates module to use latest features offered in v4.x provider
• Variable name change made to align with resource name spec (was a legacy name that looks to have been missed in prior breaking change)
• Pulling this module up to be as current as possible before using in EKS module v19.x
  • This module will create the launch template and ASG for the EKS self managed node group, the launch template for the EKS managed node group, and probably add the option to create a launch template with user data rendered for use with Karpenter which handles cluster compute scaling using launch template). This will also give users of self managed node groups the ability to control desired size or not, which has been requested quite a bit
• Closes #183
• Closes #184

Breaking Changes

• Yes; provider major version bump and one variable name change - no state manipulations required

How Has This Been Tested?

• [x] I have updated at least one of the examples/* to demonstrate and validate my change(s)
• [x] I have tested and validated these changes using one or more of the provided examples/* projects
• [x] I have executed pre-commit run -a on my pull request

[antonbabenko]

This PR is included in version 6.0.0 :tada:

[danielkza]

This completely broke warm_pool option by giving it the wrong type. It is not a map with string values. How did this go unnoticed?

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