feat(esph21): bringup and test panic handler

Author: ESP-Marius

tools/test_apps/system/.build-test-rules.yml

@@ -85,11 +85,7 @@ tools/test_apps/system/no_embedded_paths:
 
 tools/test_apps/system/panic:
   enable:
-    - if: INCLUDE_DEFAULT == 1 or IDF_TARGET in ["esp32p4", "esp32c61"] # preview targets
-  disable:
-    - if: IDF_TARGET == "esp32h21"
-      temporary: true
-      reason: not supported  # TODO: [ESP32h21] IDF-11543
+    - if: INCLUDE_DEFAULT == 1 or IDF_TARGET in ["esp32p4", "esp32c61", "esp32h21"] # preview targets
 
 tools/test_apps/system/rtc_mem_reserve:
   enable:

tools/test_apps/system/panic/README.md

@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
-| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- | -------- | -------- |
+| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-H21 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | --------- | -------- | -------- | -------- |
 
 # Introduction