crimson/net/io_handler: ctor add gate ctor with shard id

IOHandler::to_new_sid provides a mechanism to switch to a new core from the current one used.
This behavior is tricky for making sure that we keep the IOHandler::shard_states_t::gate instance to be used on the same core that it was created.
In order to resolve this, we should be able to construct Gated out of specified core_id (and not from this_shard_id).

See: ceph#58986 (comment)

Signed-off-by: NitzanMordhai <[email protected]>

Author: NitzanMordhai

src/crimson/common/gated.h

@@ -18,6 +18,7 @@ namespace crimson::common {
 class Gated {
  public:
   Gated() : sid(seastar::this_shard_id()) {}
+  Gated(const seastar::shard_id sid) : sid(sid) {}
   Gated(const Gated&) = delete;
   Gated& operator=(const Gated&) = delete;
   Gated(Gated&&) = default;

src/crimson/net/io_handler.h

@@ -255,7 +255,7 @@ class IOHandler final : public ConnectionHandler {
   class shard_states_t {
   public:
     shard_states_t(seastar::shard_id _sid, io_state_t state)
-      : sid{_sid}, io_state{state} {}
+      : sid{_sid}, io_state{state}, gate{_sid} {}
 
     seastar::shard_id get_shard_id() const {
       return sid;