OPL Parser: contains substring and regex matches

[albertlockett]

We need to design a syntax for OPL for substring contains and regex match.

KQL uses a syntax like:

x contains "y"
x matches regex ".*albert.*"

We could do something similar, or do something more like a function call contains(x, "y"). Will leave the actualy syntax unprescribed for this moment.

Once we've decided on the syntax:

• add support to the parser these should parse into LogicalExpression::Matches and LogicalExpression::Contains
• update the tests in columnar query engine pipeline::filter module to be driven by OPLParser as well as KQL parser.