feat(spanner): migrate batch 1 core samples and tests#4273

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angelcaamal wants to merge 3 commits intoGoogleCloudPlatform:mainfrom

angelcaamal:spanner-core-tests

Commits on Mar 31, 2026

feat(spanner): first batch of samples including create database and update
angelcaamal
committed
fix(spanner): address PR review comments for INT64 keys and concurrency limit
angelcaamal
committed
fix(spanner): disable database drop protection during test cleanup
angelcaamal
committed