fix: protobuf export path in compileProtos (#1708)

Author: sofisl

tools/src/compileProtos.ts

@@ -170,7 +170,7 @@ function fixJsFile(js: string): string {
   // depend on protobufjs, so we re-export it from google-gax
   js = js.replace(
     'import * as $protobuf from "protobufjs/minimal"',
-    'import {protobufMinimal  as $protobuf} from "google-gax/build/src/protobuf.js"',
+    'import {protobufMinimal  as $protobuf} from "google-gax/build/src/protobuf"',
   );
 
   // 1. fix protobufjs require: we don't want the libraries to

tools/test/compileProtos.ts

@@ -160,7 +160,7 @@ describe('compileProtos tool', () => {
       js
         .toString()
         .includes(
-          'import {protobufMinimal  as $protobuf} from "google-gax/build/src/protobuf.js"',
+          'import {protobufMinimal  as $protobuf} from "google-gax/build/src/protobuf"',
         ),
     );
     assert(!js.toString().includes('require("protobufjs/minimal")'));