`azurerm_orchestrated_virtual_machine_scale_set` - support for the `user_data_base64` property

[gcampbell12]

Adds user data to VMSS azurerm_orchestrated_virtual_machine_scale_set resource, the VMSS API requires this value to be base64 encoded hence the schema validation

[gcampbell12]

Acceptance test results:

==> Checking that code complies with gofmt requirements...
==> Checking that Custom Timeouts are used...
==> Checking that acceptance test packages are used...
TF_ACC=1 go test -v ./internal/services/compute -run=TestAccOrchestratedVirtualMachineScaleSet_otherUserData -timeout 60m -ldflags="-X=github.com/hashicorp/terraform-provider-azurerm/version.ProviderVersion=acc"
=== RUN   TestAccOrchestratedVirtualMachineScaleSet_otherUserData
=== PAUSE TestAccOrchestratedVirtualMachineScaleSet_otherUserData
=== CONT  TestAccOrchestratedVirtualMachineScaleSet_otherUserData
--- PASS: TestAccOrchestratedVirtualMachineScaleSet_otherUserData (460.98s)
PASS
ok      github.com/hashicorp/terraform-provider-azurerm/internal/services/compute       462.354s

[github-actions[bot]]

This functionality has been released in v3.24.0 of the Terraform Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions[bot]]

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