[Query Tracker] Add ability to pass DECLARE parameters to YQL queries

[Krock21]

YQL supports DECLARE syntax for parameters passed outside of query text

Currently, there is no way to pass them via query tracker api. We need to support that

We need to add ability to pass parameters to YQL queries started with start_query API

One way to do it is to parse "settings" of the query

[Krock21]

Current workaround is to use FileContent in a query and pass files via files parameter of start_query

Example

[kaikash]

any updates?