feat(spanner): allow attempt direct path xds via env var #9582
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To enable Direct Access, both
EnableDirectPath
andEnableDirectPathXds
should be added in the client options for grpctransport to append the correct google-c2p scheme.This PR adds a env var
GOOGLE_SPANNER_ENABLE_DIRECT_ACCESS
to control the enable/disable of Direct Access. When it is true, it adds theEnableDirectPathXds
option which effectively turns on Direct Access (EnableDirectPath
has already been added above).BEGIN_COMMIT_OVERRIDE
feat(spanner): Allow attempt direct path xds via env var
END_COMMIT_OVERRIDE