Removed x86 build from pipeline (#9764)

Author: yaira2

builds/azure-pipelines-release.yml

@@ -32,7 +32,7 @@ variables:
 - name: solution
   value: '**/*.sln'
 - name: buildPlatform
-  value: 'x86|x64|arm64'
+  value: 'x64|arm64'
 - name: buildConfiguration
   value: 'Release'
 - name: sideloadBuildConfiguration