Add integration tests to verify table and index limits for live spanner migration from PostgreSQ#3265

lszinv wants to merge 6 commits intoGoogleCloudPlatform:mainGoogleCloudPlatform/DataflowTemplates:mainfrom

lszinv:lsz/pg-table-and-index-limit-tests-livelszinv/DataflowTemplates:lsz/pg-table-and-index-limit-tests-liveCopy head branch name to clipboard