Get a full list of repos for the installer

[floreks]

Summary

Used custom repositories query for the installer to get an actually full list of repositories (SEARCH_REPOS only gets first 20). Since wizard does not support proper pagination/virtual scrolling right now, we can't benefit from using query param in the GQL query.

Test Plan

Locally

Checklist

• If required, I have updated the Plural documentation accordingly.
• I have added tests to cover my changes.
• I have added a meaningful title and summary to convey the impact of this PR to a user.
• I have added relevant labels to this PR to help with categorization for release notes.

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  • https://app.asana.com/0/0/1203911145305919

[github-actions]

Visit the preview URL for this PR (updated for commit 307a0e7):

https://pluralsh-console--pr264-wizard-repo-query-w67s634q.web.app

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