Use official API for setting email

Using the official API will reduce code in this role.
Furthermore, using an official API remove the need to deploy
dedicated scripts. And such deploy can be annoying depending
on the overall deployment (native, docker, docker-compose, kubernetes).
So, using official API will offer the ability to reuse easier this role
in much more context.

tasks/main.yml

@@ -212,7 +212,29 @@
         httpHeader: "{{ nexus_rut_auth_header }}"
   when: nexus_rut_auth_header is defined
 
-- include_tasks: setup_email.yml
+- name: Configure mail server
+  ansible.builtin.uri:
+    url: "{{ nexus_api_scheme }}://{{ nexus_api_hostname }}:{{ nexus_api_port }}{{ nexus_api_context_path }}/service/rest/v1/email"
+    user: admin
+    password: "{{ current_nexus_admin_password }}"
+    method: PUT
+    force_basic_auth: true
+    validate_certs: "{{ nexus_api_validate_certs }}"
+    body_format: json
+    body:
+      enabled: "{{ nexus_email_server_enabled }}"
+      host: "{{ nexus_email_server_host }}"
+      port: "{{ nexus_email_server_port }}"
+      username: "{{ nexus_email_server_username }}"
+      password: "{{ nexus_email_server_password }}"
+      fromAddress: "{{ nexus_email_from_address }}"
+      subjectPrefix: "{{ nexus_email_subject_prefix }}"
+      startTlsEnabled: "{{ nexus_email_tls_enabled }}"
+      startTlsRequired: "{{ nexus_email_tls_required }}"
+      sslOnConnectEnabled: "{{ nexus_email_ssl_on_connect_enabled }}"
+      sslServerIdentityCheckEnabled: "{{ nexus_email_ssl_check_server_identity_enabled }}"
+      nexusTrustStoreEnabled: "{{ nexus_email_trust_store_enabled }}"
+    status_code: 200,204
 
 - name: Configure branding capability
   ansible.builtin.include_tasks: call_script.yml