use autorest.python 5.3.0 (Azure#13835)

* use autorest.python 5.3.0

* codeowner

Author: changlong-liu

.github/CODEOWNERS

@@ -101,7 +101,8 @@
 /common/smoketest/                                                   @lmazuel @chlowell @annatisch @rakshith91 @shurd @southpolesteve
 
 # Management Plane
-/**/*mgmt*/     @zikalino
+/**/*mgmt*/     @msyyc @jsntcy @changlong-liu
+
 
 ###########
 # Eng Sys

swagger_to_sdk_config.json

@@ -3,7 +3,7 @@
   "meta": {
     "autorest_options": {
       "version": "3.0.6272",
-      "use": "@autorest/python@5.1.0-preview.1",
+      "use": "@autorest/python@5.3.0",
       "python": "",
       "python-mode": "update",
       "sdkrel:python-sdks-folder": "./sdk/.",