Should skip install update

[sheidkamp]

Description

Export IsGatewayInstalled from test library for use from other packages.

Same testing steps as in #10466

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[solo-changelog-bot]

Issues linked to changelog:
https://github.com/solo-io/solo-projects/issues/7432

[github-actions]

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