Fix integration test with ansibe-core 2.20 (#951) (#959)

This is a backport of PR #951 as merged into main (f568c9d).
SUMMARY
Now that ansible-core 2.19.0rc1 has been released, ansible-core’s devel branch has been bumped from 2.19.0.dev0 to 2.20.0.dev0. This potentially requires collection CIs to be updated which rely on devel using tests/sanity/ignore-2.19.txt, for example. Also it’s now time to add stable-2.19 to CI if you relied on devel to cover 2.19 so far. Note that milestone has also been updated to 2.20.0dev0.
During testing, I noticed that the failed test tasks/test_helm_not_installed.yml due to the new error message with ansible 2.20, please find here and following comments.
ISSUE TYPE

Bugfix Pull Request

COMPONENT NAME
test/CI (tasks/test_helm_not_installed.yml)
ADDITIONAL INFORMATION
to be cherry-picked to the stable-6 and stable-5

Reviewed-by: Bianca Henderson <beeankha@gmail.com>

tests/integration/targets/helm/tasks/test_helm_not_installed.yml

@@ -13,3 +13,11 @@
     that:
       - helm_missing_binary is failed
       - "'No such file or directory' in helm_missing_binary.msg"
+  when: ansible_version.full is version('2.20', '<')
+
+- name: Assert that helm is not installed (ansible 2.20+)
+  assert:
+    that:
+      - helm_missing_binary is failed
+      - "'Error executing command' in helm_missing_binary.msg"
+  when: ansible_version.full is version('2.20', '>=')