Provider function parse_resource_id: Populate the resource_name for resource group and subscription

[magodo]

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Description

This PR populates the resource_name returned by the provider function parse_resource_id, for resource group and subscription. The sanity here is that both of them returns the correct (full_)resource_type, the resource_name shall also be there to be consistent.

PR Checklist

• I have followed the guidelines in our Contributing Documentation.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
• I have checked if my changes close any open issues. If so please include appropriate closing keywords below.
• I have updated/added Documentation as required written in a helpful and kind way to assist users that may be unfamiliar with the resource / data source.
• I have used a meaningful PR title to help maintainers and other users understand this change and help prevent duplicate work.
  For example: “resource_name_here - description of change e.g. adding property new_property_name_here”

Changes to existing Resource / Data Source

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• I have written new tests for my resource or datasource changes & updated any relevent documentation.
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Testing

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Change Log

Below please provide what should go into the changelog (if anything) conforming to the Changelog Format documented here.

• azurerm_resource - support for the thing1 property [GH-00000]

This is a (please select all that apply):

• Bug Fix
• New Feature (ie adding a service, resource, or data source)
• Enhancement
• Breaking Change

Related Issue(s)

Fixes #28295

Note

If this PR changes meaningfully during the course of review please update the title and description as required.