Sporadic OOM when inserting a large number of relations

[dmitrii-ubskii]

To reproduce:
Follow the steps in https://github.com/vaticle/typedb-examples/blob/catalogue-of-life/catalogue_of_life/README.md#quickstart

Typical output:
OOM in typedb server while finalizing the "naming" rule. Occasionally the loader OOMs as well.