Add test case for Vector with borsh serializer

[denbite]

Pre-flight checklist

• [x] I have read the Contributing Guidelines on pull requests.
• [x] Commit messages follow the conventional commits spec
• [x] If this is a code change: I have written unit tests.
• [x] If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

Added a new test case (based on GuestBook contract) to verify that Near collections (Vector, LookupMap, etc) are correctly serialized and deserialized using the borsh

Test Plan

Related issues/PRs

#402