Missing instructions to suppress preview feature warnings

[jikuja]

Description

E.g. Entra ID related CmdLets still have preview warning attributes on those. E.g.: https://github.com/Azure/azure-powershell/blob/5607f221ec17cedec89da945181893495d5a1e5e/src/Resources/MSGraph.Autorest/generated/cmdlets/NewAzADGroupGraphRefMember_Create.cs#L22

Using Set-AzConfig -DisplayBreakingChangeWarning $false will not turn off those message but $Env:SuppressAzurePowerShellBreakingChangeWarnings = "true"

For discussion:

• Is behaviour of Runtime.PreviewMessage documented?
• Should code generator generate code that also does proper checks for AzConfig data to allow more granlular suppression by namespace or by CmdLet name
• Is this warning on Entra ID related Cmdlets still needed?
• Is environment variable usage documented:
  • not here: https://learn.microsoft.com/en-us/powershell/azure/configure-global-settings?view=azps-12.4.0
  • exists here: https://learn.microsoft.com/en-us/powershell/azure/faq?view=azps-12.4.0

Historical ticket mentions only -WarningAction Ignore but that's not good.

Script or Debug output

Environment data

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Error output