fix: correct gc tombstone to graveyard

[zz-jason]

I added a flag enable_eager_garbage_collection for eager GC after each transaction commit to check whether tombstones of removed tuples are deleted or moved to the graveyard as expected.

Ref to Scalable and Robust Snapshot Isolation for High-Performance Storage Engines

[codecov[bot]]

Codecov Report

Attention: 230 lines in your changes are missing coverage. Please review.

Comparison is base (80a74e9) 34.47% compared to head (fbee343) 35.34%.

Files	Patch %	Lines
source/concurrency-recovery/ConcurrencyControl.cpp	37.50%	10 Missing and 75 partials :warning:
source/storage/btree/TransactionKV.cpp	9.67%	54 Missing and 30 partials :warning:
source/concurrency-recovery/HistoryTree.cpp	40.00%	2 Missing and 13 partials :warning:
source/storage/buffer-manager/TreeRegistry.hpp	26.31%	7 Missing and 7 partials :warning:
source/utils/RandomGenerator.hpp	40.00%	3 Missing and 6 partials :warning:
source/LeanStore.cpp	22.22%	0 Missing and 7 partials :warning:
source/concurrency-recovery/Worker.cpp	53.84%	1 Missing and 5 partials :warning:
source/concurrency-recovery/CRMG.cpp	62.50%	2 Missing and 1 partial :warning:
source/storage/buffer-manager/BufferManager.cpp	40.00%	2 Missing and 1 partial :warning:
...rce/storage/buffer-manager/BufferFrameProvider.hpp	0.00%	1 Missing and 1 partial :warning:
... and 2 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #41 +/- ## ========================================== + Coverage 34.47% 35.34% +0.86% ========================================== Files 85 85 Lines 7619 7713 +94 Branches 3608 3706 +98 ========================================== + Hits 2627 2726 +99 + Misses 3419 3286 -133 - Partials 1573 1701 +128 ```

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