[SPARK-22875][BUILD] Assembly build fails for a high user id

## What changes were proposed in this pull request?

Add tarLongFileMode=posix configuration for the assembly plugin

## How was this patch tested?

Reran build successfully
```
./build/mvn package -Pbigtop-dist -DskipTests -rf :spark-assembly_2.11
[INFO] Spark Project Assembly ............................. SUCCESS [ 23.082 s]
```

Author: Gera Shegalov <gshegalov@salesforce.com>

Closes #20055 from gerashegalov/gera/tarLongFileMode.

pom.xml

@@ -2295,6 +2295,9 @@
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-assembly-plugin</artifactId>
           <version>3.1.0</version>
+          <configuration>
+            <tarLongFileMode>posix</tarLongFileMode>
+          </configuration>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>