Data Validator - Output Results Content

Currently the output of the DVT is stored in the schema mentioned as below
https://github.com/GoogleCloudPlatform/professional-services-data-validator/blob/develop/terraform/results_schema.json

There are below set of observations and enhancements as below
1. The results of the execution does not store the **applied filter** on source/target

2. The results of the execution does not store the **custom query** applied, this makes it difficult to understand against what queries the validation results are produced.

3. For the **hashed and concatenated columns** in row validation, the output results does not store the columns used for hashing or concatenation.