Manually remove certification at expiration from a non-mandatory inherent

Same as #72 but for certifications.

changed milestone to %runtime-400

added C-runtime D-hard P5-sometimesoon S-ToDo labels

changed title from Manually remove certifiaction at expiration from a non-mandatory inherent to Manually remove certification at expiration from a non-mandatory inherent

changed milestone to %ğtest migration

changed milestone to %runtime-600

changed milestone to %runtime-700

changed milestone to %runtime-701

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changed milestone to %runtime-802

mentioned in merge request !246 (merged)

Not sure of this one. We still want the certifications to expire at a precise time and the consequences (membership loss) to be treated immediately. But apart from that, the intent behind this is linked with #206.

changed milestone to %runtime-803

removed S-ToDo label

removed milestone %runtime-803

added P9-somedaymaybe label

removed P5-sometimesoon label