Move validation to validation service package

[DyrellC]

Description

Part of the #1646 breakdown. To prepare for the migration of solidity logic from the TransactionValidator, we will be moving the TransactionValidator to a more appropriate location. As it is a service, it will now be located in the service directory under the validation sub-directory.

Type of change

• Enhancement (a non-breaking change which adds functionality)

How Has This Been Tested?

• Regression and Unit tests continue to pass

Checklist:

• My code follows the style guidelines for this project
• I have performed a self-review of my own code
• New and existing unit tests pass locally with my changes