When upgrading Zoe on chain, revive KREAd subscribers

[Chris-Hibbert]

What is the Problem Being Solved?

When Zoe is upgraded, various promises held by the KREAd contract will break.

Description of the Design

According to #8714, the promises can be repaired by calling the reviveMarketExitSubscribers method on the KREAd contract's creatorFacet.

This ticket says to invoke that method when upgrading Zoe in upgrade14 or upgrade15.

Security Considerations

Keep customer contracts working.

Scaling Considerations

Not pertinent.

Test Plan

#8714 established that the method is there. We should add a test in a3p-integration to show that the KREAd contract continues to function.

Upgrade Considerations

Upgrading shouldn't break things.