dovecot: replace solr fts with flatcurve (xapian) (#5680)

* fts-flatcurve: inital implementation

* fts: removed solr from compose.yml

* flatcurve: added heap and proc logic to dovecot

* added logic for update.sh & generate for Flatcurve

* delete old iteration of fts-flatcurve.conf

* updated default fts.conf

* updated .gitignore to exclude fts.conf for further git updates

* Remove autogeneration of fts.conf (disable override)

* cleanup all left solr stuff

* renamed SKIP_FLATCURVE to SKIP_FTS

* cleanup leftovers solr in lang files

* moved lazy_expunge plugin only to mail_plugins

* added fts timeout value

* compose: remove dev image of dovecot

* updated japanese translation

data/web/lang/lang.zh-tw.json

@@ -505,7 +505,6 @@
         "external_logs": "外部紀錄",
         "history_all_servers": "歷史 (所有伺服器)",
         "in_memory_logs": "記憶體紀錄",
-        "jvm_memory_solr": "JVM 記憶體使用量",
         "last_modified": "上次修改時間",
         "log_info": "<p>mailcow 的<b>記憶體紀錄</b>會被收集到 Redis 清單中並且每分鐘自動縮減到 LOG_LINES (%d) 以避免重複撞擊 (hammering) 造成的大量記錄。\r\n<br>記憶體紀錄並不會永久保存。所有記錄到記憶體的應用程式也會同時透過預設紀錄的驅動程式寫入紀錄到 Docker 常駐程式中。\r\n<br>記憶體紀錄是設計用來為容器中的小問題除錯的。</p>\r\n<p><b>外部紀錄</b>透過應用程式提供的 API 收集。</p>\r\n<p><b>靜態紀錄</b>大多為不寫入到 Dockerd，但仍然需要被保存的活動紀錄 (API 紀錄除外)。</p>",
         "login_time": "時間",
@@ -514,8 +513,6 @@
         "restart_container": "重新啟動",
         "service": "服務",
         "size": "大小",
-        "solr_dead": "Solr 正在啟動,停用或已停止運行.",
-        "solr_status": "Solr 狀態",
         "started_at": "啟動於",
         "started_on": "啟動於",
         "static_logs": "靜態紀錄",