fix compaction_picker_test asan heap use after free (#12908)

Summary:
![image](https://github.com/user-attachments/assets/3290fe18-aca2-4691-b072-fbbc96a15fb1)

this testcase set syncpoint function which reference this test case heap variable "enable_per_key_placement_" and this sync point function will be triggered by another testcase, so asan will report asan heap use after free error

Pull Request resolved: #12908

Reviewed By: hx235

Differential Revision: D60973363

Pulled By: cbi42

fbshipit-source-id: df4f488f51e7741784d5a92fc0a5fc538c5d5b1a

db/compaction/compaction_picker_test.cc

@@ -214,7 +214,10 @@ class CompactionPickerTest : public CompactionPickerTestBase {
   explicit CompactionPickerTest()
       : CompactionPickerTestBase(BytewiseComparator()) {}
 
-  ~CompactionPickerTest() override = default;
+  ~CompactionPickerTest() override {
+    SyncPoint::GetInstance()->ClearAllCallBacks();
+    SyncPoint::GetInstance()->DisableProcessing();
+  }
 };
 
 class CompactionPickerU64TsTest : public CompactionPickerTestBase {