feat: Add plan conversion statistics to extended explain info #1720

Job	Run time
iceberg-spark-extensions/${{ matrix.os }}/iceberg-${{ matrix.iceberg-version.full }}/spark-${{ matrix.spark-version.full }}/scala-${{ matrix.scala-version }}/java-${{ matrix.java-version }}	0s
iceberg-spark-runtime/${{ matrix.os }}/iceberg-${{ matrix.iceberg-version.full }}/spark-${{ matrix.spark-version.full }}/scala-${{ matrix.scala-version }}/java-${{ matrix.java-version }}	0s
iceberg-spark/${{ matrix.os }}/iceberg-${{ matrix.iceberg-version.full }}/spark-${{ matrix.spark-version.full }}/scala-${{ matrix.scala-version }}/java-${{ matrix.java-version }}	0s
	0s

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