[GSoC-2022] Experimental Function - hawickCircuits

[nitishchauhan0022]

This PR adds one new pgRouting function:

• pgr_hawickcircuits: Returns the circuits present in the directed graph.

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_hawickCircuits	pgRouting/GSoC-pgRouting#211 pgRouting/GSoC-pgRouting#218 pgRouting/GSoC-pgRouting#223 pgRouting/GSoC-pgRouting#228 pgRouting/GSoC-pgRouting#231 pgRouting/GSoC-pgRouting#235 pgRouting/GSoC-pgRouting#242 pgRouting/GSoC-pgRouting#248 pgRouting/GSoC-pgRouting#251 pgRouting/GSoC-pgRouting#253 pgRouting/GSoC-pgRouting#256 pgRouting/GSoC-pgRouting#259

[cvvergara]

The fail is on the translation, that will be fixed afterwards