[RM-6181] Resolve incompatibility with plans from Terraform v1.0.8

[jason-fugue]

Recent versions of Terraform have changed the format of references in plan files. An example of that change is included in the test files in this PR. Previously, references just contained the ID of the referenced resource:

...
"kms_key_id": {
    "references": [
        "aws_kms_key.cloudwatch"
    ]
}
...

Now, they contain the ID as well as the specific property being referenced:

...
"kms_key_id": {
    "references": [
        "aws_kms_key.cloudwatch.key_id",
        "aws_kms_key.cloudwatch"
    ]
}
...

This PR accounts for that change by filtering out the specific properties and just retaining the resource ID.

This will hopefully resolve #220 and #221. It could also potentially resolve #222.

[jaspervdj-luminal]

Nice catch!