BulkOperationPacked decode() bug

### Description

public void decode(
byte[] blocks, int blocksOffset, long[] values, int valuesOffset, int iterations) {
long nextValue = 0L;
int bitsLeft = bitsPerValue;
for (int i = 0; i < iterations * byteBlockCount; ++i) {
final long bytes = blocks[blocksOffset++] & 0xFFL;
if (bitsLeft > 8) {
// just buffer
bitsLeft -= 8;
nextValue |= bytes << bitsLeft;
} else {
// flush
int bits = 8 - bitsLeft;
values[valuesOffset++] = nextValue | (bytes >>> bits);
while (bits >= bitsPerValue) {
bits -= bitsPerValue;
values[valuesOffset++] = (bytes >>> bits) & mask;
}
// then buffer
bitsLeft = bitsPerValue - bits;
nextValue = (bytes & ((1L << bits) - 1)) << bitsLeft;
}
}
assert bitsLeft == bitsPerValue;
}
maybe use for 【iterations * byteValueCount】

### Version and environment details

_No response_

Start by locating BulkOperationPacked.decode() and compare its loop bound with the suggested iterations * byteValueCount expression. Verify how byteBlockCount and byteValueCount are defined and reproduce the decoding behavior with the existing Lucene tests; done means the method consumes the correct number of bytes and decodes all requested values correctly.

Written by the indexing model from the issue text.