[SPARK-53955][CORE][3.5] Prefer to detect Java Home from env JAVA_HOME on finding jmap for JDK 8

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

Prefer to detect Java Home from env `JAVA_HOME` on finding `jmap`, then System Properties `java.home`

### Why are the changes needed?

https://stackoverflow.com/questions/45441516/difference-between-java-home-and-java-home

> `JAVA_HOME` points to the JDK installation path given by the Environment Variable.
>
> But `java.home` points to the JRE installation path.

Somehow, it returns the same value in JDK 11+ (according to the following article, users are still able to create a JRE by themselves?), but it returns a different value in JDK 8 or prior

https://adoptium.net/news/2021/12/eclipse-temurin-jres-are-back

```
➜  spark-3.5.7-bin-hadoop3 bin/spark-shell
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
25/10/20 17:59:07 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Spark context Web UI available at http://HIH-D-25944Z:4040
Spark context available as 'sc' (master = local[*], app id = local-1760954347801).
Spark session available as 'spark'.
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_\   version 3.5.7
      /_/

Using Scala version 2.12.18 (OpenJDK 64-Bit Server VM, Java 17.0.15)
Type in expressions to have them evaluated.
Type :help for more information.

scala> System.getProperty("java.home")
res0: String = /home/chengpan/.sdkman/candidates/java/17.0.15-zulu

scala> System.getenv("JAVA_HOME")
res1: String = /home/chengpan/.sdkman/candidates/java/17.0.15-zulu
```
```
➜  spark-3.5.7-bin-hadoop3 bin/spark-shell
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
25/10/20 17:59:25 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Spark context Web UI available at http://HIH-D-25944Z:4040
Spark context available as 'sc' (master = local[*], app id = local-1760954366052).
Spark session available as 'spark'.
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_\   version 3.5.7
      /_/

Using Scala version 2.12.18 (OpenJDK 64-Bit Server VM, Java 1.8.0_432)
Type in expressions to have them evaluated.
Type :help for more information.

scala> System.getProperty("java.home")
res0: String = /home/chengpan/.sdkman/candidates/java/8.0.432.fx-zulu/jre

scala> System.getenv("JAVA_HOME")
res1: String = /home/chengpan/.sdkman/candidates/java/8.0.432.fx-zulu
```

In JDK8, `jmap` exists under `JAVA_HOME/bin`, but not under `JAVA_HOME/jre/bin`.

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

No.

### How was this patch tested?

Manually verified.

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

No.

Closes #52665 from pan3793/SPARK-53955.

Authored-by: Cheng Pan <[email protected]>
Signed-off-by: yangjie01 <[email protected]>

Author: pan3793

core/src/main/scala/org/apache/spark/util/Utils.scala

@@ -2142,7 +2142,8 @@ private[spark] object Utils
   def getHeapHistogram(): Array[String] = {
     // From Java 9+, we can use 'ProcessHandle.current().pid()'
     val pid = getProcessName().split("@").head
-    val jmap = System.getProperty("java.home") + "/bin/jmap"
+    val jmap = Option(System.getenv("JAVA_HOME"))
+      .getOrElse(System.getProperty("java.home")) + "/bin/jmap"
     val builder = new ProcessBuilder(jmap, "-histo:live", pid)
     val p = builder.start()
     val rows = ArrayBuffer.empty[String]