chore(x-goog-spanner-request-id): add x_goog_spanner_request_id as an attribute to OTEL spans#1378

olavloite merged 2 commits intogoogleapis:maingoogleapis/python-spanner:mainfrom

odeke-em:propagate-x_goog_spanner_request_id-to-OTEL-spanodeke-em/python-spanner:propagate-x_goog_spanner_request_id-to-OTEL-spanCopy head branch name to clipboard