[test] Add the missing algorithm header

Compilation is failing on certain versions of gcc with:
'sort' is not a member of 'std'
'adjacent_find' is not a member of 'std'
'count' is not a member of 'std' and

Bug: v8:10145
Change-Id: I0672636987c515485318d29d251c3b49a22ff374
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2008307
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Reviewed-by: Milad Farazmand <miladfar@ca.ibm.com>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65884}

test/unittests/base/utils/random-number-generator-unittest.cc

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <algorithm>
 #include <climits>
 
 #include "src/base/utils/random-number-generator.h"

test/unittests/libplatform/default-worker-threads-task-runner-unittest.cc

@@ -4,6 +4,7 @@
 
 #include "src/libplatform/default-worker-threads-task-runner.h"
 
+#include <algorithm>
 #include <vector>
 
 #include "include/v8-platform.h"