azurerm_role_assignment - fix id parsing for root or provider scoped role assignments

[Felix-Franz]

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Description

With the azurerm_role_assignment resource it is possible to make RBAC assignments on root or resource provider scope.
The functionality was added in #26663.

The creation succeeds, but the provider cannot parse the resource ID from the ARM-response.
Following error is displayed:

Error: could not parse Role Assignment ID "/providers/Microsoft.Authorization/roleAssignments/23456781-2349-8764-5631-234567890121"

The PR is intended to fix the parsing of the resource ID and thus enable an assignment on root or resource provider scope.

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Change Log

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• 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 #0000

Note

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

[Felix-Franz]

@stephybun @catriona-m I am taging you because you were involved in the original PR.
Could you please review this PR?

[stephybun]

Thanks for this PR @Felix-Franz.

I'm wondering whether the parser used in the delete call might also require an update? Looking at what it's doing I believe it will be fine, but since our testing credentials lack the privileges to create role assignments on these scopes, it'd help us out if you could confirm whether with this fix you can also delete the role assignments without issue?

[stephybun]

Thanks @Felix-Franz LGTM 🏖️