[master < T1217] Implement InDegree and OutDegree in O(1)

[mpintaric55334]

While implementing refactor functions, we figured it would be good to implement In and Out degrees to use already made functions in c-api, so the degree getting operation is O(1).

[master < Task] PR

• Check, and update documentation if necessary
• Provide the full content or a guide for the final git message

To keep docs changelog up to date, one more thing to do:

• Write a release note here, including added/changed clauses
  Users can now get the In and Out degrees of a node in O(1) in Cpp API.
• Tag someone from docs team in the comments

[mpintaric55334]

@vpavicic willl write docs when PR is reviewed.

[antoniofilipovic]

All good but would modfiy tests

[antoniofilipovic]

Looks good to me