[SPARK-49749][CORE] Change log level to debug in BlockManagerInfo

### What changes were proposed in this pull request?

This PR changes the log level to debug in `BlockManagerInfo`.

### Why are the changes needed?

Before this PR:
Logging in `BlockManagerMasterEndpoint` uses 3.25% of the CPU and generates 60.5% of the logs.

<img width="1186" alt="image" src="https://github.com/user-attachments/assets/81013d98-8700-4e4f-a1aa-aa17fc0c5c52">

```
cat spark.20240921-09.log | grep "in memory on" | wc -l
8587851
cat spark.20240921-09.log | wc -l
14185544
```

After this PR:
<img width="1196" alt="image" src="https://github.com/user-attachments/assets/6d52cd2c-de3b-4a32-a6e8-a98c42909faa">

```
cat  spark.20240926-09.log | grep "in memory on" | wc -l
0
cat  spark.20240926-09.log | wc -l
2224037
```

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

N/A.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #48197 from wangyum/SPARK-49749.

Authored-by: Yuming Wang <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>

core/src/main/scala/org/apache/spark/storage/BlockManagerMasterEndpoint.scala

@@ -1059,13 +1059,13 @@ private[spark] class BlockManagerInfo(
         _blocks.put(blockId, blockStatus)
         _remainingMem -= memSize
         if (blockExists) {
-          logInfo(log"Updated ${MDC(BLOCK_ID, blockId)} in memory on " +
+          logDebug(log"Updated ${MDC(BLOCK_ID, blockId)} in memory on " +
             log"${MDC(HOST_PORT, blockManagerId.hostPort)}  (current size: " +
             log"${MDC(CURRENT_MEMORY_SIZE, Utils.bytesToString(memSize))}, original " +
             log"size: ${MDC(ORIGINAL_MEMORY_SIZE, Utils.bytesToString(originalMemSize))}, " +
             log"free: ${MDC(FREE_MEMORY_SIZE, Utils.bytesToString(_remainingMem))})")
         } else {
-          logInfo(log"Added ${MDC(BLOCK_ID, blockId)} in memory on " +
+          logDebug(log"Added ${MDC(BLOCK_ID, blockId)} in memory on " +
             log"${MDC(HOST_PORT, blockManagerId.hostPort)} " +
             log"(size: ${MDC(CURRENT_MEMORY_SIZE, Utils.bytesToString(memSize))}, " +
             log"free: ${MDC(FREE_MEMORY_SIZE, Utils.bytesToString(_remainingMem))})")
@@ -1075,12 +1075,12 @@ private[spark] class BlockManagerInfo(
         blockStatus = BlockStatus(storageLevel, memSize = 0, diskSize = diskSize)
         _blocks.put(blockId, blockStatus)
         if (blockExists) {
-          logInfo(log"Updated ${MDC(BLOCK_ID, blockId)} on disk on " +
+          logDebug(log"Updated ${MDC(BLOCK_ID, blockId)} on disk on " +
             log"${MDC(HOST_PORT, blockManagerId.hostPort)} " +
             log"(current size: ${MDC(CURRENT_DISK_SIZE, Utils.bytesToString(diskSize))}," +
             log" original size: ${MDC(ORIGINAL_DISK_SIZE, Utils.bytesToString(originalDiskSize))})")
         } else {
-          logInfo(log"Added ${MDC(BLOCK_ID, blockId)} on disk on " +
+          logDebug(log"Added ${MDC(BLOCK_ID, blockId)} on disk on " +
             log"${MDC(HOST_PORT, blockManagerId.hostPort)} (size: " +
             log"${MDC(CURRENT_DISK_SIZE, Utils.bytesToString(diskSize))})")
         }
@@ -1098,13 +1098,13 @@ private[spark] class BlockManagerInfo(
         blockStatus.remove(blockId)
       }
       if (originalLevel.useMemory) {
-        logInfo(log"Removed ${MDC(BLOCK_ID, blockId)} on " +
+        logDebug(log"Removed ${MDC(BLOCK_ID, blockId)} on " +
           log"${MDC(HOST_PORT, blockManagerId.hostPort)} in memory " +
           log"(size: ${MDC(ORIGINAL_MEMORY_SIZE, Utils.bytesToString(originalMemSize))}, " +
           log"free: ${MDC(FREE_MEMORY_SIZE, Utils.bytesToString(_remainingMem))})")
       }
       if (originalLevel.useDisk) {
-        logInfo(log"Removed ${MDC(BLOCK_ID, blockId)} on " +
+        logDebug(log"Removed ${MDC(BLOCK_ID, blockId)} on " +
           log"${MDC(HOST_PORT, blockManagerId.hostPort)} on disk" +
           log" (size: ${MDC(ORIGINAL_DISK_SIZE, Utils.bytesToString(originalDiskSize))})")
       }