[Backport 7.x] Allow the client name to be a symbol (#1257)

Co-authored-by: Tomas Della Vedova <delvedor@users.noreply.github.com>

lib/Transport.d.ts

@@ -52,7 +52,7 @@ export interface RequestEvent<TResponse = Record<string, any>, TContext = unknow
   warnings: string[] | null;
   meta: {
     context: TContext;
-    name: string;
+    name: string | symbol;
     request: {
       params: TransportRequestParams;
       options: TransportRequestOptions;