fix: fix stub cache key generation for global cache

[wschurman]

Why

4e40b2e#diff-7787fea5a7ed6c1892424d39f09dbc4aR51 added a companion-wide stub cache adapter to better simulate testing a real external cache adapter. Unfortunately, the cache key generation function for the stub cache adapter wasn't updated accordingly, so keys for entities from different tables could collide.

How

Use a more comprehensive cache key generation function.

Test Plan

yarn tsc

[codecov]

Codecov Report

Merging #59 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #59   +/-   ##
=======================================
  Coverage   94.07%   94.07%           
=======================================
  Files          58       58           
  Lines        1384     1384           
  Branches      147      147           
=======================================
  Hits         1302     1302           
  Misses         81       81           
  Partials        1        1           

Flag	Coverage Δ
#integration	94.07% <100.00%> (ø)
#unittest	94.07% <100.00%> (ø)

Impacted Files	Coverage Δ
...kages/entity/src/utils/testing/StubCacheAdapter.ts	100.00% <100.00%> (ø)

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