Add allow_runner_registration_token usage ping
What does this MR do and why?
This MR implements a settings.allow_runner_registration_token
usage ping so that we can tell how many admins re-enabled runner registration tokens on the instance after we disable it in %17.0.
Closes #458237 (closed)
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How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
Run bin/rake gitlab:usage_data:dump_sql_in_json | jq '.settings'