test(ethereum): fix broken validations in tests

[ashnashahgrover]

Refactor all the negative test case exception assertions for cactus-plugin-ledger-connector-ethereum so that they do not use try-catch blocks but instead declare the requirements through Jest's (and jest-extended's) own API.

The parent issue with a much more detailed explanation of what's needed and code examples on how to do it: Parent Issue: https://github.com/hyperledger/cacti/issues/3455

Acceptance Criteria Test passes the same as before Negative test case assertions have been migrated the way it is explained in the parent issue.

[ashnashahgrover]

This issue is now dependent on this issue:

https://github.com/hyperledger/cacti/issues/3487

[adrianbatuto]

Issue is blocked by #3487 and #3507.