[component] Devirtualize call_dump_config

Remove virtual from Component::call_dump_config() since only
MQTTComponent overrode it. The MQTT override skipped dump_config
for internal entities, which unnecessarily hid useful debug info
from startup logs. The is_internal flag means "don't expose to
Home Assistant", not "don't log config".

This also removes one vtable entry from every Component subclass
and eliminates the indirect call overhead.

esphome/components/mqtt/mqtt_component.cpp

@@ -405,12 +405,6 @@ void MQTTComponent::process_resend() {
     this->schedule_resend_state();
   }
 }
-void MQTTComponent::call_dump_config() {
-  if (this->is_internal())
-    return;
-
-  this->dump_config();
-}
 void MQTTComponent::schedule_resend_state() { this->resend_state_ = true; }
 bool MQTTComponent::is_connected_() const { return global_mqtt_client->is_connected(); }
 

esphome/components/mqtt/mqtt_component.h

@@ -98,8 +98,6 @@ class MQTTComponent : public Component {
   /// Override setup_ so that we can call send_discovery() when needed.
   void call_setup() override;
 
-  void call_dump_config() override;
-
   /// Send discovery info the Home Assistant, override this.
   virtual void send_discovery(JsonObject root, SendDiscoveryConfig &config) = 0;
 

esphome/core/application.cpp

@@ -256,7 +256,7 @@ void Application::process_dump_config_() {
 #endif
   }
 
-  this->components_[this->dump_config_at_]->call_dump_config();
+  this->components_[this->dump_config_at_]->call_dump_config_();
   this->dump_config_at_++;
 }
 

esphome/core/component.cpp

@@ -211,7 +211,7 @@ bool Component::cancel_retry(uint32_t id) {
 
 void Component::call_loop_() { this->loop(); }
 void Component::call_setup() { this->setup(); }
-void Component::call_dump_config() {
+void Component::call_dump_config_() {
   this->dump_config();
   if (this->is_failed()) {
     // Look up error message from global vector

esphome/core/component.h

@@ -291,7 +291,7 @@ class Component {
 
   void call_loop_();
   virtual void call_setup();
-  virtual void call_dump_config();
+  void call_dump_config_();
 
   /// Helper to set component state (clears state bits and sets new state)
   void set_component_state_(uint8_t state);