Merge branch 'docs/delete_user_guide_esp32_s2_and_s3' into 'master'

docs: Delete user guide esp32-s2-saola-1, esp32-s3-devkitc-1 and esp32-s3-devkitm-1

Closes DOC-6934, DOC-6935, DOC-6936, and DOC-6937

See merge request espressif/esp-idf!34229

Author: Zhang Shu Xian

docs/_static/ESP32-S3-DevKitC-1_v1-SystemBlock.png

@@ -120,7 +120,7 @@ If you have one of {IDF_TARGET_NAME} official development boards listed below, y
     .. toctree::
         :maxdepth: 1
 
-        ESP32-S2-Saola-1 <../hw-reference/esp32s2/user-guide-saola-1-v1.2>
+        ESP32-S2-Saola-1 <https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32s2/esp32-s2-saola-1/index.html>
         ESP32-S2-DevKitM-1 <https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32s2/esp32-s2-devkitm-1/index.html>
         ESP32-S2-DevKitC-1 <https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32s2/esp32-s2-devkitc-1/index.html>
         ESP32-S2-Kaluga-Kit <https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32s2/esp32-s2-kaluga-1/index.html>
@@ -139,8 +139,8 @@ If you have one of {IDF_TARGET_NAME} official development boards listed below, y
     .. toctree::
         :maxdepth: 1
 
-        ESP32-S3-DevKitC-1 <../hw-reference/esp32s3/user-guide-devkitc-1>
-        ESP32-S3-DevKitM-1 <../hw-reference/esp32s3/user-guide-devkitm-1>
+        ESP32-S3-DevKitC-1 <https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32s3/esp32-s3-devkitc-1/index.html>
+        ESP32-S3-DevKitM-1 <https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32s3/esp32-s3-devkitm-1/index.html>
 
 .. only:: esp32c2