Fix no-tag table attribute deletion

[Caideyipi]

Summary

• coalesce duplicate devices in one multi-row table insert to their final effective attribute values before schema validation
• preserve insert null/no-op semantics while combining partial attribute columns
• cover no-tag table device attributes before attribute-filtered deletion

Tests

• mvn spotless:apply -pl iotdb-core/datanode,integration-test -P with-integration-tests
• mvn --% -o -Ddevelocity.off=true -pl iotdb-core/datanode -Dtest=TableDeviceSchemaValidatorTest test
• mvn --% -o -Ddevelocity.off=true install -DskipTests -pl iotdb-core/datanode -am
• mvn --% -o -Ddevelocity.off=true verify -DskipUTs -Dit.test=IoTDBDeletionTableIT#testDeleteDataByAttributeFilterWithoutTagColumns -DfailIfNoTests=false -Dfailsafe.failIfNoSpecifiedTests=false -pl integration-test -PTableClusterIT -P with-integration-tests

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud