[button] Use a user provided default constructor

esphome/components/button/button.h

@@ -24,6 +24,9 @@ void log_button(const char *tag, const char *prefix, const char *type, Button *o
  */
 class Button : public EntityBase {
  public:
+  // User provided, not "= default": `new(p) Button()` would zero-fill .bss that is already zero.
+  Button() {}
+
   /** Press this button. This is called by the front-end.
    *
    * For implementing buttons, please override press_action.

esphome/components/text/text_traits.h

@@ -30,8 +30,8 @@ class TextTraits {
   TextMode get_mode() const { return this->mode_; }
 
  protected:
-  int min_length_{0};
-  int max_length_{0};
+  int min_length_;
+  int max_length_;
   const char *pattern_{""};
   TextMode mode_{TEXT_MODE_TEXT};
 };