Add a Calcite-based implementation for conversion of SQL statements from one SQL dialect to another

[DJSagarAhire]

This change does the following:

• Creates an expression factory for compiling SQL expressions in one SQL dialect to another
• Adds an interface for conversion from one SQL dialect to another in cdap-data-pipeline-base
• Adds an implementation for the validation and conversion using Calcite in a new module cdap-calcite which also shades its dependency on Guava 31 using maven-shade-plugin.

Note:

• ENUM and UNION types are currently unsupported as Calcite has no support for them (as far as I could find).