Update cross chain update command tests

[sitetester]

Description

Add/update tests in mainchain / sidechain cross chain update commands.

Motivation

Some common tests could be moved to parent class while some missing tests could be added

Additional Information

• framework/test/unit/modules/interoperability/base_cross_chain_update_command.spec.ts
• framework/test/unit/modules/interoperability/mainchain/commands/submit_mainchain_cross_chain_update.spec.ts
• framework/test/unit/modules/interoperability/sidechain/commands/submit_sidechain_cross_chain_update.spec.ts