Should handle failures to allocate PSP memory space more gracefully

[hrydgard]

One of the easy cases are the Find4GBBase call, as mentioned in #16601 (comment) - we do that on game startup and should be able to handle failures of that gracefully.

Many of the remaining crashes are OOMs, which we could handle more gracefully in a bunch of places, although will never be a good user experience and some cases are not really practical to catch.