fix[gen1][core]: ENG-9774 backported fix from v6.1.1 into v5 upgrade

[clyde-builderio]

For Manual upgrade only
Reference: #4102

JIRA Ticket:
https://builder-io.atlassian.net/browse/ENG-9800

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Latest commit: b142373

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GitGuardian id	GitGuardian status	Secret	Commit	Filename
14200383	Triggered	Generic High Entropy Secret	b142373	packages/core/src/builder.class.test.ts	View secret

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---

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[clyde-builderio]

Closing to create a new PR