test: fix flaky Apple Game Center tests

[dblythy]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Attempts to fix flaky gcenter tests.

Related issue: #8057
Closes: #8057

Approach

TODOs before merging

• Add tests
• A changelog entry is created automatically using the pull request title (do not manually add a changelog entry)

[parse-github-assistant]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[codecov]

Codecov Report

Base: 94.17% // Head: 86.88% // Decreases project coverage by -7.29% ⚠️

Coverage data is based on head (33027a7) compared to base (0388956).
Patch has no changes to coverable lines.

❗ Current head 33027a7 differs from pull request most recent head 3fb30b5. Consider uploading reports for the commit 3fb30b5 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##            alpha    #8204      +/-   ##
==========================================
- Coverage   94.17%   86.88%   -7.30%     
==========================================
  Files         182      182              
  Lines       13744    13744              
==========================================
- Hits        12944    11942    -1002     
- Misses        800     1802    +1002     

Impacted Files	Coverage Δ
src/Adapters/Storage/Mongo/MongoCollection.js	4.76% <0.00%> (-92.86%)	⬇️
src/Adapters/Storage/Mongo/MongoStorageAdapter.js	11.91% <0.00%> (-81.28%)	⬇️
src/Adapters/Cache/RedisCacheAdapter.js	12.28% <0.00%> (-75.44%)	⬇️
src/Adapters/Files/GridFSBucketAdapter.js	10.65% <0.00%> (-68.86%)	⬇️
...rc/Adapters/Storage/Mongo/MongoSchemaCollection.js	35.48% <0.00%> (-62.37%)	⬇️
src/GraphQL/loaders/filesMutations.js	37.93% <0.00%> (-41.38%)	⬇️
src/Adapters/Storage/Mongo/MongoTransform.js	48.51% <0.00%> (-39.91%)	⬇️
src/Adapters/Auth/gcenter.js	59.52% <0.00%> (-34.53%)	⬇️
src/Routers/SessionsRouter.js	65.71% <0.00%> (-25.72%)	⬇️
src/GraphQL/transformers/mutation.js	83.96% <0.00%> (-13.21%)	⬇️
... and 15 more

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[dblythy]

1st test run fails due to flaky postgres tests - closing and reopening to check another test run

[mtrezza]

No flaky Gamecenter test observed, re-running all tests to see whether they pass again

[mtrezza]

No flaky tests observed, again re-running

[parseplatformorg]

🎉 This change has been released in version 5.3.0-alpha.28

[parseplatformorg]

🎉 This change has been released in version 5.4.0-beta.1

[parseplatformorg]

🎉 This change has been released in version 5.4.0-alpha.1

[parseplatformorg]

🎉 This change has been released in version 5.4.0

[parseplatformorg]

🎉 This change has been released in version 5.4.0