Support for VMSS in-line extensions behind feature flag

[jackofallops]

This PR adds beta support for adding VM Extensions to azurerm_linux_virtual_machine_scale_set and azurerm_windows_virtual_machine_scale_set

Set the env var ARM_PROVIDER_VMSS_EXTENSIONS_BETA to anything but an empty string to enable

resolves #5976

Adds example of Service Fabric with VMSS + inline extension.

TODO's

• docs

[tombuildsstuff]

hey @jackofallops

Thanks for this PR - I've taken a look through and left some comments inline - but this is off to a good start. If we can fix those up then we should be able to take another look and get this merged 👍🏻

Thanks!

[tombuildsstuff]

(not an issue, for info) since this is using d.HasChange this should support mixing both the inline and external resource here as required

[tombuildsstuff]

I've left a few comments inline but this otherwise otherwise LGTM 👍

[tombuildsstuff]

Left a few comments inline but this otherwise LGTM 👍

[jackofallops]

Tests passing:

(failures transient / unrelated)

[ghost]

This has been released in version 2.26.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 2.26.0"
}
# ... other configuration ...

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 hashibot-feedback@hashicorp.com. Thanks!