Move RawQuerySniff rom MEQP Coding Standard

### Description
Move [RawQuerySniff](https://github.com/magento/marketplace-eqp/blob/master/MEQP1/Sniffs/SQL/RawQuerySniff.php) from MEQP Coding Standard:

Acceptance criteria:
- sniff is moved from MEQP repo to magento-coding-standard;
- sniff is covered by unit test;
- unite test covers negative and positive scenarios.

### Additional information
Type: _warning_.
Severity: _9_.