[stable-2.9] Pin psutil version in tests (#70715)

A recent update to psutil introduced a breaking change

test/integration/targets/pids/tasks/main.yml

@@ -3,7 +3,7 @@
 # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
 - name: "Installing the psutil module"
   pip:
-    name: psutil
+    name: psutil==5.6.7
 
 - name: "Checking the empty result" 
   pids: 

test/integration/targets/setup_mongodb/defaults/main.yml

@@ -45,5 +45,5 @@ redhat_packages_py3:
   - python3-pip
 
 pip_packages:
-  - psutil
-  - pymongo
+  - psutil==5.6.7
+  - pymongo==3.10.1