DX-122953 Preserve list offset allocation size

Author: prashanthbdremio

vector/src/main/java/org/apache/arrow/vector/complex/LargeListVector.java

@@ -323,8 +323,10 @@ private void ensureEmptyOffsetBufferCapacity(long requiredCapacity) {
     if (offsetBuffer.capacity() >= requiredCapacity) {
       return;
     }
+    long previousOffsetAllocationSizeInBytes = offsetAllocationSizeInBytes;
     ArrowBuf oldOffsetBuffer = offsetBuffer;
     offsetBuffer = allocateOffsetBuffer(requiredCapacity);
+    offsetAllocationSizeInBytes = previousOffsetAllocationSizeInBytes;
     oldOffsetBuffer.getReferenceManager().release();
   }
 

vector/src/main/java/org/apache/arrow/vector/complex/ListVector.java

@@ -281,8 +281,10 @@ private void ensureEmptyOffsetBufferCapacity(long requiredCapacity) {
     if (offsetBuffer.capacity() >= requiredCapacity) {
       return;
     }
+    long previousOffsetAllocationSizeInBytes = offsetAllocationSizeInBytes;
     ArrowBuf oldOffsetBuffer = offsetBuffer;
     offsetBuffer = allocateOffsetBuffer(requiredCapacity);
+    offsetAllocationSizeInBytes = previousOffsetAllocationSizeInBytes;
     oldOffsetBuffer.getReferenceManager().release();
   }