SOLR-18157: Optimize buffer allocation in JavaBinCodec

[psalagnac]

https://issues.apache.org/jira/browse/SOLR-18157

This implements a smarter allocation strategy using powers of 2 for the internal buffer of JavaBinCodec. The goal is to reduce the number of allocations.

Added a JMH benchmark suite to measure serialization performance with different batch sizes. I see a small improvement in throughput locally. I expect the impact to be slightly higher in JVMs with big heap for other reasons.

### Before
Benchmark             (batchSize)   (type)   Mode  Cnt     Score     Error  Units
RequestWriters.write           10  javabin  thrpt    5  5770,665 ± 636,538  ops/s
RequestWriters.write          100  javabin  thrpt    5   591,845 ±  11,787  ops/s
RequestWriters.write         1000  javabin  thrpt    5    58,766 ±   8,620  ops/s
RequestWriters.write        10000  javabin  thrpt    5     5,980 ±   0,044  ops/s

### AFTER
Benchmark             (batchSize)   (type)   Mode  Cnt     Score     Error  Units
RequestWriters.write           10  javabin  thrpt    5  5824,500 ± 482,134  ops/s
RequestWriters.write          100  javabin  thrpt    5   601,498 ±   4,600  ops/s
RequestWriters.write         1000  javabin  thrpt    5    59,621 ±   0,995  ops/s
RequestWriters.write        10000  javabin  thrpt    5     5,988 ±   0,108  ops/s