Return Result from vm_memory.rs methods instead of using expect

[cptartur]

software-mansion/protostar#2006

There are methods in vm_memory.rs using expect. These should be changed to return anyhow result with relevant message. It should panic at the cheatcodes_hint_processor level, or this method should be moved there.

[piotmag769]

Is it still relevant?

[cptartur]

Not sure, someone could take this issue and verify it it makes sense still.

[MaksymilianDemitraszek]

@cptartur Please include specific code locations when creating such issues, otherwise it is just: Check the whole codebase and see if we can do something better which is not very productive :p

[piotmag769]

I think this task was created when the runner was still changing very rapidly, so it made sense back then ;P

[cptartur]

I've verified and it seems only methods that still have unwrap or expect, aside from parts of cheatcodes hint processor, are on vm_memory.rs.

Updating the issue description