fix: Reduce RowPartition memory allocation #524

Job	Run time
macos-14(Silicon)/java 8-spark-3.4/rust	3m 53s
ubuntu-latest/java 8-spark-3.2/java	44m 38s
ubuntu-latest/java 8-spark-3.4/rust	5m 16s
ubuntu-latest/java 8-spark-3.3/java	46m 25s
macos-14(Silicon)/java 8-spark-3.4/java	31m 57s
ubuntu-latest/java 8-spark-3.4/java	44m 40s
ubuntu-latest/java 11-spark-3.3/java	48m 42s
macos-14(Silicon)/java 17-spark-3.4/rust	4m 1s
ubuntu-latest/java 17-spark-3.4/rust	5m 15s
ubuntu-latest/java 17-spark-3.3/java	44m 25s
macos-14(Silicon)/java 17-spark-3.4/java	38m 0s
ubuntu-latest/java 17-spark-3.4/java	43m 5s
macos-14(Silicon)/java 8-spark-3.2/java	29m 25s
macos-14(Silicon)/java 17-spark-3.3/java	30m 37s
${{ matrix.os }}/java ${{ matrix.java_version }}-spark-${{ matrix.spark-version }}/${{ matrix.test-target }}	0s
	7h 0m 19s

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