Improve expansions on disk

[as51340]

Docs:

memgraph/documentation#252

NOTE:

Some e2e disk tests are disabled since a lot of things changes in this PR. All commented tests aren't that important for our workloads (query modules interacting with writing to DB, mock API, triggers...). This PR makes it possible to run 1-hop expansions with 30 Q/s. Currently, the performance of 1-hop expansion is 0.5 Q/s. Next PRs will deal with further improvements.

Tasks:

Currently, serializing edges across multiple column families should be solved. That means creating edges and modifying edges should work.

Create out_edges and in_edges column families ✅
Serializing edges ✅
Remove prefetching edges ✅
Modify edge creation ✅
Modify edge deletion ✅
Delete vertex ✅
Detach delete vertex ✅
Refactored indices ✅
Made thinner vertex and edge accessors by sending pointer to the storage. ✅
How to call OutEdges? ✅
How to call InEdges? ✅
fix all unit tests ✅
revert changes from some unit tests now that we handle changes from the current transaction ✅

[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