Metrics prefetcher script

[volatilemolotov]

Script changes and optimizations. Most notable:

• changed the database schema to allow for alerting queries.
• removes the old sync script due to duplication
• changes the GA PostCommit Status dashboard with new query that uses crosstab to allow the dash to use the same tables without duplication
• Terraform to deploy the function

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[volatilemolotov]

@damccorm let me know what do you think on this PR. Once merged it will change the dashboard while the script needs to be deployed manually using terraform

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[volatilemolotov]

Put into draft again as i need to cleanup the GA Post-Commits Status dashboard query just to make it more consistent with the naming and test it out.