Update setup_pexpect to prefer pip user installs.

This works around issues on RHEL 7.9 when an old version of pexpect is installed from an OS package.

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

@@ -3,8 +3,17 @@
     src: constraints.txt
     dest: "{{ remote_tmp_dir }}/pexpect-constraints.txt"
 
+- name: Install pexpect with --user
+  pip:
+    name: pexpect
+    extra_args: '--user --constraint "{{ remote_tmp_dir }}/pexpect-constraints.txt"'
+    state: present
+  ignore_errors: yes  # fails when inside a virtual environment
+  register: pip_user
+
 - name: Install pexpect
   pip:
     name: pexpect
     extra_args: '--constraint "{{ remote_tmp_dir }}/pexpect-constraints.txt"'
     state: present
+  when: pip_user is failed