[ENG-303] Improve error message for provider query

[floreks]

Summary

Updated terraform provider error message when it is not found.

Linear

Test Plan

Added unit test

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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[floreks]

@michaeljguarino PTAL

[floreks]

Done. PTAL @michaeljguarino

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[floreks]

@michaeljguarino thanks! All clear now.