Update flux chart to 1.5.0 (and flux to 1.20.2)

Fixes: #662

ansible/group_vars/all/settings.yml.example

@@ -54,6 +54,8 @@ flux:
   # see https://github.com/fluxcd/flux/blob/master/chart/flux/README.md
   # for reference
   extra_opts: ""
+  # chart version
+  version: "1.5.0"
   # If true, let the auto-update mechanism (flux) follow a cluster-local git
   # repo, not the one specified above
   local_flux: false

ansible/roles/apps/tasks/core.yml

@@ -118,7 +118,7 @@
   #   flux
   #   # Chart name
   #   flux
-  shell: helm upgrade --install --repo "https://charts.fluxcd.io" --namespace oas --version 1.3.0 --set git.url="{{ git_url }}" --set git.branch="{{ git_branch }}" --set git.path="{{ git_path }}" --set git.readonly=true --set registry.excludeImage='*' --set sync.state="secret" --set syncGarbageCollection.enabled=true --set manifestGeneration=true --set git.pollInterval=1h {{ extra_opts }} flux flux
+  shell: helm upgrade --install --repo "https://charts.fluxcd.io" --namespace oas --version "{{ flux.version }}" --set git.url="{{ git_url }}" --set git.branch="{{ git_branch }}" --set git.path="{{ git_path }}" --set git.readonly=true --set registry.excludeImage='*' --set sync.state="secret" --set syncGarbageCollection.enabled=true --set manifestGeneration=true --set git.pollInterval=1h {{ extra_opts }} flux flux
 
 - name: Install fluxctl via snap
   tags: