fix: use lazy refresh for Cloud SQL Connector#86
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The Cloud SQL Python Connector just released a new version
v1.10.0that supports setting the
refresh_strategyargument of the connector.Setting the refresh strategy to lazy refresh is recommended for
serverless environments. As the default refresh strategy is to
have background refreshes occur to get the instance metadata and a fresh
certificate to use for the SSL/TLS connection.
However, these background refreshes can be throttled when serverless
environments scale to zero (Cloud Functions, Cloud Run etc.).
This PR will fix the ambiguous errors that are a result of the CPU being
throttled for the Cloud SQL Connector.