fix(toolchain): install qemu-xtensa if esp32s3 target is requested

Related to https://github.com/espressif/vscode-esp-idf-extension/issues/1404

tools/tools.json

@@ -953,7 +953,8 @@
       "license": "GPL-2.0-only",
       "name": "qemu-xtensa",
       "supported_targets": [
-        "esp32"
+        "esp32",
+        "esp32s3"
       ],
       "version_cmd": [
         "qemu-system-xtensa",