Install reno>=4.1.0 on test env nodes

This is needed to generate CHANGELOG.md files from
release nodes while building chart tarballs.

Change-Id: I3c52f4ace6770515d64bfdf4433d27fd3a674eb0

playbooks/build-chart.yaml

@@ -17,6 +17,12 @@
       helm_version: "3.16.4"
 
   tasks:
+    - name: Install reno
+      pip:
+        name: reno>=4.1.0
+        extra_args: "--ignore-installed"
+      become: yes
+
     - name: make all
       make:
         chdir: "{{ zuul.project.src_dir }}"

playbooks/lint.yml

@@ -26,6 +26,12 @@
     work_dir: "{{ zuul.project.src_dir }}/{{ zuul_osh_infra_relative_path | default('') }}"
 
   tasks:
+    - name: Install reno
+      pip:
+        name: reno>=4.1.0
+        extra_args: "--ignore-installed"
+      become: yes
+
     - name: make all
       make:
         chdir: "{{ zuul.project.src_dir }}"