test(lib-dynamodb): add timestamp to table name in e2e tests (#5347)

* test(lib-dynamodb): add timestamp to table name in e2e tests

* test(lib-dynamodb): additional table name randomness

lib/lib-dynamodb/src/test/lib-dynamodb.e2e.spec.ts

@@ -40,14 +40,14 @@ describe(DynamoDBDocument.name, () => {
     }
   }
 
-  // Random element limited to 0-99 to avoid concurrent build IO.
   // Tables will be dropped at the end of the test.
   // For faster test development, remove this random suffix and
   // don't delete the table in afterAll().
   // The table will in that case be re-used.
-  const randId = String((Math.random() * 99) | 0);
+  const randId = (Math.random() + 1).toString(36).substring(2, 6);
+  const timestamp = (Date.now() / 1000) | 0;
 
-  const TableName = `js-sdk-dynamodb-test-${randId}`;
+  const TableName = `js-sdk-dynamodb-test-${timestamp}-${randId}`;
 
   const log = {
     describe: null as null | DescribeTableCommandOutput,