playbooks/bugs.archlinux.org: Add a playbook for the new flyspray VPS

Create a playbook for the new flyspray deployment. It has all the roles
required to run flyspray.

playbooks/bugs.archlinux.org.yml

+---
+
+- name: setup bugs.archlinux.org
+  hosts: bugs.archlinux.org
+  remote_user: root
+  roles:
+    - { role: common }
+    - { role: tools }
+    - { role: sshd }
+    - { role: root_ssh }
+    - { role: certbot }
+    - { role: nginx }
+    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_table_open_cache: '256', mariadb_query_cache_type: '0',
+              mariadb_innodb_file_per_table: True }
+    - { role: sudo }
+    - { role: php-fpm, php_extensions: ['apcu', 'iconv', 'intl', 'mysqli'], zend_extensions: ['opcache'], tags: ["php-fpm"] }
+    - { role: flyspray, tags: ["flyspray"] }
+    - { role: borg-client, tags: ["borg"] }
+    - { role: postfix, tags: ["postfix"], postfix_relayhost: "orion.archlinux.org" }
+    - { role: fail2ban, tags: ["fail2ban"] }