Renamed extension.ts to main.ts for AzureMonitor (#16052)

extensions/azuremonitor/extension.webpack.config.js

@@ -12,6 +12,6 @@ const withDefaults = require('../shared.webpack.config');
 module.exports = withDefaults({
 	context: __dirname,
 	entry: {
-		main: './src/extension.ts'
+		main: './src/main.ts'
 	}
 });

extensions/azuremonitor/package.json

@@ -11,7 +11,7 @@
     "vscode": "*",
     "azdata": ">=1.31.0"
   },
-  "main": "./out/extension",
+  "main": "./out/main",
   "repository": {
     "type": "git",
     "url": "https://github.com/Microsoft/azuredatastudio.git"