Add an e2e test for fetch cache with ISR

[vicb]

Ref:

• fix: make patchAsyncStorage work with non-mutable node:module modules #730 (review)
• Implement patchAsyncStorage() opennextjs-cloudflare#158

Opening this issue to make sure this is handled in the cloudflare adapter once the test is added

/cc @conico974 @dario-piotrowicz

[conico974]

Fixed in #783