Add test cases for DB query parsing and sanitization

[alanwest]

Towards #984

Opening this PR to start a discussion for how we want to format test cases for database query parsing and sanitization.

Each test case includes the following fields

• A name identifying the test case
• A sql statement representing the input
• An array of valid sanitized versions of the input
  • For example, the specification states that IN clauses MAY be collapsed. So, both IN (?) and IN (?,?,?) are valid.
• summary is what db.query.summary should equal
• operation is what db.operation.name should equal
• collection is what db.collection.name should equal
• An array of dialects that the test case targets
  • For now I have only validated this test suite against my work on MSSQL. However, many of these test cases are equally valid for other dialects.

For this first iteration I would like to settle on the format for presenting these test cases. In follow ups we can expand the test cases and also handle additional idiosyncrasies of other dialects.

[alanwest]

@trask @lmolkova I plan to attend the DB semconv meeting tomorrow so we have a chance to discuss this synchronously first.