Add param_1_label & param_2_label to lvpct view

DEFRA/water-abstraction-service#2663

As part of the migration of legacy pages into the new system, we identified missing information in the licence_version_purpose_condition_types table.
Specifically, the param1 and param2 values in the licence_version_purpose_conditions table are dynamically associated with row titles derived from the
code and subcode in the licence_version_purpose_condition_types table. To correctly reference these row titles for each parameter, we added the
static values to the licence_version_purpose_condition_types table. We now need to add the `param_1_label` and `param_2_label` to the licence_version_purpose_condition_types
view.

This PR introduces two new columns,`param_1_label` and `param_2_label` to the licence_version_purpose_condition_types view.