Support creating insiders.vscode.dev permalinks (#3440)

Author: joyceerhl

src/issues/issueFeatureRegistrar.ts

@@ -1119,7 +1119,7 @@ ${body ?? ''}\n
 			// asExternalUri can throw when in the browser and the embedder doesn't set a uri resolver.
 			return link;
 		}
-		const authority = (uri.scheme === 'https' && /^(vscode|github)\./.test(uri.authority)) ? uri.authority : undefined;
+		const authority = (uri.scheme === 'https' && /^(insiders\.vscode|vscode|github)\./.test(uri.authority)) ? uri.authority : undefined;
 		if (!authority) {
 			return link;
 		}