ENG ideas: Change Respected Game Type Without Invalidating Withdrawals

[BlocksOnAChain]

We wanted to share an idea for some teams to explore about creating "Change Respected Game Type Without Invalidating Withdrawals"

Is your feature request related to a problem? Please describe.

When the respected game type is changed in OptimismPortal, it also invalidates any already proven withdrawals, requiring users to reprove them and wait an additional 7 days. While this is desirable in some cases, we need a way to change the respected game type without invalidating withdrawals. This avoids users being impacted when pre-emptively switching to the permissioned game or when switching back to the permissionless game after fixes are deployed.

Additional context

We would like to start this line of work in H2 2024.