SegmentLocalCacheManagerConcurrencyTest: Use tempDir for temp files. (#18937)

The tests should use temporary directories rather than the current
working directory.

Author: gianm

server/src/test/java/org/apache/druid/segment/loading/SegmentLocalCacheManagerConcurrencyTest.java

@@ -255,7 +255,7 @@ public void testAcquireSegment() throws IOException, ExecutionException, Interru
   @Test
   public void testAcquireSegmentFailTooManySegments() throws IOException
   {
-    final File localStorageFolder = new File("local_storage_folder");
+    final File localStorageFolder = new File(tempDir, "local_storage_folder");
 
     final Interval interval = Intervals.of("2019-01-01/P1D");
     makeSegmentsToLoad(20, localStorageFolder, interval, segmentsToLoad);
@@ -281,7 +281,7 @@ public void testAcquireSegmentFailTooManySegments() throws IOException
   @Test
   public void testAcquireSegmentBulkFailTooManySegments() throws IOException
   {
-    final File localStorageFolder = new File("local_storage_folder");
+    final File localStorageFolder = new File(tempDir, "local_storage_folder");
 
     final Interval interval = Intervals.of("2019-01-01/P1D");
     makeSegmentsToLoad(30, localStorageFolder, interval, segmentsToLoad);