*: Simplify Server.cpp (#9804)

ref #6233

Simplify Server.cpp

* Reduce parsing `DisaggregatedMode` for multiple times
* Add `Setup.cpp` for setting up the SIMD and jemalloc/mimalloc settings
* Add `TCPServersHolder.cpp`
  * Rename `TcpHttpServersHolder` to `TCPServersHolder` because we never create http server in TiFlash now
  * Merge TCPHandlerFactory into `TCPServersHolder.cpp`
* Remove some useless config inherited from Clickhouse
  * Remove `display_name`, always show "TiFlash" for TCP connections
  * Remove `default_database`, always use "system" for TCP connections
  * Remove `max_concurrent_queries`, no limitation for the number of queries in process list
  * Remove `listen_try` in `TCPServersHolder`
  * Remove `tcp_port_secure` in `TCPServersHolder`

Author: JaySon-Huang

dbms/src/Common/Logger_fwd.h

@@ -0,0 +1,24 @@
+// Copyright 2025 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <memory>
+
+namespace DB
+{
+class Logger;
+using LoggerPtr = std::shared_ptr<Logger>;
+
+} // namespace DB

dbms/src/Flash/Management/ManualCompact.h

@@ -27,11 +27,9 @@
 #include <kvproto/tikvpb.pb.h>
 #pragma GCC diagnostic pop
 
-#include <atomic>
 #include <boost/noncopyable.hpp>
 #include <cstddef>
 #include <memory>
-#include <set>
 
 namespace DB
 {

dbms/src/Server/CMakeLists.txt

@@ -43,8 +43,10 @@ add_library (tiflash-server-lib
     Server.cpp
     StatusFile.cpp
     TCPHandler.cpp
+    TCPServersHolder.cpp
     BgStorageInit.cpp
     Bootstrap.cpp
+    Setup.cpp
     StorageConfigParser.cpp
     UserConfigParser.cpp
     RaftConfigParser.cpp)

dbms/src/Server/InterruptListener.h

@@ -66,7 +66,7 @@ class InterruptListener
 {
 private:
     bool active;
-    sigset_t sig_set;
+    sigset_t sig_set{};
 
 public:
     InterruptListener()

dbms/src/Server/MockComputeClient.h

@@ -18,6 +18,9 @@
 #include <coprocessor.pb.h>
 #include <fmt/core.h>
 #include <kvproto/tikvpb.grpc.pb.h>
+
+#include <magic_enum.hpp>
+
 using grpc::Channel;
 using grpc::Status;