remove azurerm provider requirements

[sschne]

• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code follows the code style of this project.
• I ran lint checks locally prior to submission.
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Description

45b14a4 introduced in issue in the azure_devops and azure_devops_agent add-ons which leads to conflict in azurerm provider requirements:

│ Error: Failed to query available provider packages
│
│ Could not retrieve the list of available versions for provider hashicorp/azurerm: no available releases match the given constraints ~> 2.55.0, ~> 2.81.0

Both add-ons are still pinned to version 5.3.0 of the aztfmod/caf/azurerm module. This itself has a requirement on 2.55.0 of the azurerm provider, thus the conflict.

Does this introduce a breaking change

• YES
• NO

Testing