[GSoC 2023] Modifying withPointsKSP

[AbhinJ]

This PR modifies one existing function:

• pgr_withPointsKSP:
  • Improving the 'driver_side' optional parameter to compulsory parameter.
  • Adding two new result columns 'start_vid' and 'end_vid'.
  • Normalizing the output.

This is a final merge PR containing commits from several different PRs combined.

The intermediate PRs made on the GSoC-pgRouting repository are as follows:

Description	Pull Requests
pgr_withPointsKSP	pgRouting/GSoC-pgRouting#292 pgRouting/GSoC-pgRouting#297 pgRouting/GSoC-pgRouting#306 pgRouting/GSoC-pgRouting#308 pgRouting/GSoC-pgRouting#314 pgRouting/GSoC-pgRouting#317 pgRouting/GSoC-pgRouting#319 pgRouting/GSoC-pgRouting#327 pgRouting/GSoC-pgRouting#333 pgRouting/GSoC-pgRouting#337 pgRouting/GSoC-pgRouting#340 pgRouting/GSoC-pgRouting#353

The wiki page with more details on this project can be found here.