feat: Allow JDBC connection to configure direct access #2116
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Description:
Directpath allows GCP VM to connect to Spanner directly instead of going through Google Public frontend. It reduces the latency of each request, as each request flows to Spanner directly.
In JDBC connection URL/properties, customers can set
enableDirectAccess=true
to enable DirectPath. For non-GCP VM workloads, gRPC will automatically fall back to the standard network path.