Default feature labels on feature flag roll-out issue

What does this MR do and why?

Add typefeature featureaddition to the Feature Flag Roll Out template.

This avoids the bot asking the creator to do it later on.

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assigned to @thiagocsf

I considered using typemaintenance but the work classification descriptions seem to fit typefeature better.

changed milestone to %14.5

added tooling (archive) label

@rymai - Do you want to take a look at this one? See discussion at https://gitlab.slack.com/archives/C02PF508L/p1635822213107700?thread_ts=1635822213107700&cid=C02PF508L for additional context.

requested review from @rymai

approved this merge request

@rymai, thanks for approving this merge request.

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resolved all threads

merged

mentioned in commit 8720ed72

added workflowstaging-canary label

added workflowcanary label and removed workflowstaging-canary label

added workflowstaging label and removed workflowcanary label

added workflowproduction label and removed workflowstaging label

added releasedcandidate label

added releasedpublished label and removed releasedcandidate label

added typemaintenance label and removed tooling (archive) label

mentioned in merge request !98213 (merged)