test: unblock generic client test (#2922)

* test: unblock generic client test

client-dencumentation-generator package was renamed to service-client-
documentation-generator but not release yet. Hense the generic client
test is blocked because it cannot download the new package.

This change link the package from local. It will be reverted after
next release

* chore: replace instead of link because the package is not published

Author: AllanZhengYP

.github/workflows/generic-client-tests.yml

@@ -34,7 +34,13 @@ jobs:
           cd codegen
           ./gradlew clean smithy-aws-typescript-codegen:build generic-client-test-codegen:build
 
+      - name: build service-client-documentation-generator
+        run: |
+          cd packages/service-client-documentation-generator
+          yarn install && yarn build
+
       - name: build generic client
         run: |
           cd codegen/generic-client-test-codegen/build/smithyprojections/generic-client-test-codegen/aws-echo-service/typescript-codegen/
+          sed -i -e 's/"@aws-sdk\/service-client-documentation-generator":\ "3\.37\.0"/"@aws-sdk\/service-client-documentation-generator":\ "..\/..\/..\/..\/..\/..\/..\/packages\/service-client-documentation-generator"/g' package.json
           yarn install && yarn build