tune(proto): get protobuf bundle from a separate package

Raw protobuf files and compiled bundle have been moved to a separate
repository ydb-platform/ydb-nodejs-genproto and package ydb-sdk-proto.

Author: tsufiev

.github/workflows/test.yml

@@ -36,8 +36,6 @@ jobs:
         cache: 'npm'
     - name: Install dependencies
       run: npm ci
-    - name: Build bundle
-      run: npm run build:bundle
     - name: Build library
       run: npm run build:lib
     - name: Prepare examples build