ci(system): re-enable bootloader_sections test for ESP32-C2

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

@@ -134,9 +134,7 @@ tools/test_apps/storage/sdmmc_console:
 
 tools/test_apps/system/bootloader_sections:
   disable:
-    - if: IDF_TARGET == "esp32c2"
-      temporary: true
-      reason: target esp32c2 is not supported yet
+    - if: CONFIG_NAME == "rtc_retain" and SOC_RTC_FAST_MEM_SUPPORTED != 1
 
 tools/test_apps/system/build_test:
   disable:

tools/test_apps/system/bootloader_sections/README.md

@@ -1,4 +1,2 @@
-| Supported Targets | ESP32 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
-| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- |
-
-We have no rtc memory on ESP32-C2.
+| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- | -------- |