Remove trace-append and trace-ro scope aliases on compute instance scopes

[ScottSuarez]

Description

Attempted to remove these two previously as they aren't listed on the official documentation with #8496 however this is going to be a breaking change so silo'ing it for a major version release.

References

• Modify scope alias map to match the one on the official document #8496
• https://cloud.google.com/sdk/gcloud/reference/alpha/compute/instances/set-scopes#--scopes
• service_account.scopes doesn't accept "trace" alias #8495

[rileykarson]

@ScottSuarez: Feel free to unassign if you won't get to this!

I'm marking as 4.0.0-ready because there is no change needed in 3.X (we can't send a deprecation message)

[ScottSuarez]

Just dropped since I've got a lot on my plate ! This should be really quick to do though!

[github-actions]

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