azurerm_cosmosdb_account - add state migration for ip_range_filter underlying type change

[jackofallops]

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Description

Migrates the type of ip_range_filter from string to set.
Removes pre-4.0 code paths

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.
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  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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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)

Closes #27192
Closes #27242

Note

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

[stephybun]

Thanks @jackofallops other than the unnecessary attributes in the schema for the state migration LGTM 🐼

[dansali]

This caused #27308 edge case 4.0.1 -> 4.1.0 migration to break

[dansali]

https://github.com/hashicorp/terraform-provider-azurerm/pull/27276/files#diff-8d781d625516e2d8f83c0d0b3458a4eb1a737483c00ee33c2d7c7e32effd8335R560 a type check for string would fix migration from 4.0.1 -> 4.1.0 issue #27308 @jackofallops

[github-actions]

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