Improve memory tracking

[imilinovic]

This PR makes it so you can call mgp_track_current_thread_allocations on the same thread&transaction multiple times. This is needed when you want to track memory on newly created threads but are using a library such as omp.h for parallelisation. The problem is you don't know are you currently on the main thread (which is already being tracked) or a newly created thread. Attempting to untrack the same thread&transaction twice will result in a crash
Since our skiplist doesn't allow for duplicates a new struct was created which has a counter.

[master < Epic] PR

• Check, and update documentation if necessary
• Write E2E tests
• Compare the benchmarking results between the master branch and the Epic branch
• Provide the full content or a guide for the final git message

[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
• Tag someone from docs team in the comments

[antepusic]

LGTM

[antoniofilipovic]

I think counter needs to be atomic

[antoniofilipovic]

Looks good