v3: replace usage of optional types in crud with go-option

[oleg-jukovec]

The crud package implements its own optional types:

https://github.com/tarantool/go-tarantool/blob/802aa244d26017a901cf7247119515f346ac8eb6/crud/options.go#L29-L137

But we already implement a library with optional types:

https://github.com/tarantool/go-option

The goal is to remove the use of custom optional types from the crud package, replacing them with the go-option's ones.