Add state callback to ota component (#1816)

Co-authored-by: Maurice Makaay <mmakaay1@xs4all.net>
Co-authored-by: Guillermo Ruffino <glm.net@gmail.com>

tests/test1.yaml

@@ -197,6 +197,24 @@ ota:
   port: 3286
   reboot_timeout: 2min
   num_attempts: 5
+  on_state_change:
+    then:
+      lambda: >-
+        ESP_LOGD("ota", "State %d", state);
+  on_begin:
+    then:
+      logger.log: "OTA begin"
+  on_progress:
+    then:
+      lambda: >-
+        ESP_LOGD("ota", "Got progress %f", x);
+  on_end:
+    then:
+      logger.log: "OTA end"
+  on_error:
+    then:
+      lambda: >-
+        ESP_LOGD("ota", "Got error code %d", x);
 
 logger:
   baud_rate: 0