New Memset module to request DNS reloads (#40390)

test/integration/targets/memset_dns_reload/aliases

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+unsupported

test/integration/targets/memset_dns_reload/meta/main.yml

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+---

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

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+---
+- name: request reload with invalid API key
+  local_action:
+    module: memset_dns_reload
+    api_key: "wa9aerahhie0eekee9iaphoorovooyia"
+  ignore_errors: true
+  register: result
+
+- name: check API response with invalid API key
+  assert:
+    that:
+      - "'Memset API returned a 403 response (ApiErrorForbidden, Bad api_key)' in result.msg"
+      - result is not successful
+
+- name: request reload and poll
+  local_action:
+    module: memset_dns_reload
+    api_key: "{{ api_key }}"
+    poll: true
+  register: result
+
+- name: check reload succeeded
+  assert:
+    that:
+      - result is changed
+      - result is successful