Update owner for core folder (Azure#23350)

* Update owner for core folder

* Update CODEOWNERS

Author: lmazuel

.github/CODEOWNERS

@@ -13,12 +13,15 @@
 ###########
 
 # Catch all
-/sdk/ @mayurid @lmazuel
+/sdk/ @lmazuel
 
 # Core
 # PRLabel: %Azure.Core
-/sdk/core/                                                           @lmazuel @xiangyan99 @johanste @rakshith91
-/sdk/core/azure-core/                                                @xiangyan99 @lmazuel
+/sdk/core/                                                           @lmazuel @annatisch @johanste
+/sdk/core/azure-core/                                                @lmazuel @annatisch @johanste @xiangyan99 @tjprescott @iscai-msft @kashifkhan
+/sdk/core/azure-mgmt-core/                                           @msyyc
+/sdk/core/azure-core-tracing-opencensus/                             @rakshith91
+/sdk/core/azure-core-tracing-opentelemetry/                          @rakshith91
 
 ####
 # Service team