Use npm ci in CI

Author: pcholakov

.github/workflows/pre-release.yml

@@ -97,7 +97,7 @@ jobs:
       - name: Test kotlin/hello-world-lambda-cdk
         if: github.event.inputs.cdkVersion != '' || github.event.inputs.sdkJavaVersion != ''
         run: |
-          npm --prefix kotlin/hello-world-lambda-cdk install
+          npm --prefix kotlin/hello-world-lambda-cdk clean-install
           npm --prefix kotlin/hello-world-lambda-cdk run verify
 
       - name: Create Pull Request

.github/workflows/test.yml

@@ -45,13 +45,9 @@ jobs:
         with:
           arguments: check
           build-root-directory: kotlin/hello-world-lambda
-
-      # CDK projects are a hybrid of TypeScript CDK stack + platform-specific handler code; the top-level npm CDK build
-      # is responsible for verifying the language-specific handler code. They are also not a part of the TypeScript
-      # examples workspace, so we test them separately here.
       - name: Test kotlin/hello-world-lambda-cdk
         run: |
-          npm --prefix kotlin/hello-world-lambda-cdk install
+          npm --prefix kotlin/hello-world-lambda-cdk clean-install
           npm --prefix kotlin/hello-world-lambda-cdk run verify
 
   build-ts: