[VL] Fix iceberg `numWrittenFiles` metric

[zhouyuan]

Backend

VL (Velox)

Bug description

- iceberg write metrics *** FAILED ***
  0 did not equal 1 (VeloxIcebergSuite.scala:325)
07:49:59.509 WARN org.apache.gluten.execution.enhanced.VeloxIcebergSuite: 

numWrittenFiles is not updated due to below commits
facebookincubator/velox@a38ed08

for iceberg write we need to cope with the new API to update the stats

Gluten version

No response

Spark version

None

Spark configurations

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System information

No response

Relevant logs

[infvg]

take