CometMemoryPool may release more memory than acquired memory

[wForget]

Describe the bug

The memory acquired by CometMemoryPool.grow may be less than the actual request, so CometMemoryPool.shrink may release more memory than acquired memory.

datafusion-comet/native/core/src/execution/memory_pools/unified_pool.rs

Lines 93 to 95 in 25e39ab

	self.acquire(additional)
	.unwrap_or_else(|_| panic!("Failed to acquire {} bytes", additional));
	self.used.fetch_add(additional, Relaxed);

We may have two improvement options:

1. Check acquired memory when CometMemoryPool grows: #1732 (I prefer this one)
2. Add an acquired counter to avoid releasing more unacquired memory : #1731

Steps to reproduce

No response

Expected behavior

No response

Additional context

No response