Make OutParameter get method typeDesc parameter optional

[niveathika]

Description:
Currently, the OutParameter get method param is mandatory, this can be made optional since the type description can be inferred from the assigned return type.

public type OutParameter object {

    # Parses returned Char SQL value to ballerina value.
    #
    # + typeDesc - Type description of the data that need to be converted
    # + return - The converted ballerina value or Error
    public isolated function get(typedesc<anydata> typeDesc = <>) returns typeDesc|Error;
};

[niveathika]

Closing as this is completed in al modules