fix: allow array output type in tfstate outputs

[AmirKelman]

Checklist:

• [V ] Have you added or updated tests to validate the changed functionality?
• [N/A] Have you added Release Notes in the docs repositories?
• [V] Have you followed the Conventional Commits specification?

##Summary

Fix handling of Terraform state output types that are represented as arrays (e.g. ["list","string"]) instead of a single string.

##Background

Terraform/OpenTofu may serialize tfstate.outputs[*].type as a JSON array for composite types.
The existing implementation assumed this field was always a string, which caused state parsing to fail when array-based types were encountered.

This issue was reported in #1279 .

##Changes

Allow tfstate.outputs[*].type to be stored and processed as raw JSON

Update the brokerpak test framework to correctly emit array output types

Add a unit test covering array output type handling

##Impact

Backward compatible

No behavior change for existing string-typed outputs

Fixes failures when working with Terraform states containing list/object output types

##Testing

Added unit test: TestNewTfstate_AllowsArrayOutputType

Existing test suite passes for affected packages

Fixes #1279

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: AmirKelman / name: Amir Kelman (3919d96, 8539de7, dcabcda, ffc6224)

[AmirKelman]

Hi maintainers
The fix is ready and EasyCLA is now signed.
Could someone please approve the workflows so CI can run, and review when convenient?
Thanks!

[georgidimdimitrov]

Generally looks ok with minor suggestions.

[georgidimdimitrov]

Suggestions are addressed now.

[georgidimdimitrov]

Approving