feat: Add CometRowToColumnar operator #507

Job	Run time
ubuntu-latest/java 8-spark-3.4/rust	5m 20s
ubuntu-latest/java 8-spark-3.2/java	47m 10s
ubuntu-latest/java 8-spark-3.4/java	45m 45s
ubuntu-latest/java 8-spark-3.3/java	46m 58s
ubuntu-latest/java 17-spark-3.4/rust	5m 36s
macos-14(Silicon)/java 8-spark-3.4/rust	4m 1s
ubuntu-latest/java 11-spark-3.3/java	45m 2s
ubuntu-latest/java 17-spark-3.4/java	43m 33s
macos-14(Silicon)/java 8-spark-3.4/java	33m 20s
ubuntu-latest/java 17-spark-3.3/java	45m 14s
macos-14(Silicon)/java 17-spark-3.4/rust	4m 9s
macos-14(Silicon)/java 17-spark-3.4/java	38m 3s
macos-14(Silicon)/java 8-spark-3.2/java	34m 49s
macos-14(Silicon)/java 17-spark-3.3/java	32m 49s
${{ matrix.os }}/java ${{ matrix.java_version }}-spark-${{ matrix.spark-version }}/${{ matrix.test-target }}	0s
	7h 11m 49s

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