Fixed lambda sample app upload workflow (#337)

*Description of changes:*
While doing some tests, found out that the lambda sample app workflow
upload wasn't working as expected. I fixed it in this PR and tested it
here:
https://github.com/aws-observability/aws-application-signals-test-framework/actions/runs/12398929067/job/34612754042

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

.github/workflows/dotnet-sample-app-s3-deploy.yml

@@ -57,21 +57,54 @@ jobs:
           aws s3api put-object --bucket aws-appsignals-sample-app-prod-${{ matrix.aws-region }} --body ./dotnet-ec2-win-remote-setup.ps1 --key dotnet-ec2-win-remote-setup.ps1
           aws s3api put-object --bucket aws-appsignals-sample-app-prod-${{ matrix.aws-region }} --body ./amazon-cloudwatch-agent.json --key amazon-cloudwatch-agent.json
 
-      - name: Build Lambda Sample App
+  build-and-upload-lambda-sample-app:
+    strategy:
+      fail-fast: false
+      matrix:
+        aws-region: [ 'af-south-1','ap-east-1','ap-northeast-1','ap-northeast-2','ap-northeast-3','ap-south-1','ap-south-2','ap-southeast-1',
+                      'ap-southeast-2','ap-southeast-3','ap-southeast-4','ca-central-1','eu-central-1','eu-central-2','eu-north-1',
+                      'eu-south-1','eu-south-2','eu-west-1','eu-west-2','eu-west-3','il-central-1','me-central-1','me-south-1', 'sa-east-1',
+                      'us-east-1','us-east-2', 'us-west-1', 'us-west-2' ]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sample app repo
         uses: actions/checkout@v4
         with:
           repository: 'aws-observability/aws-otel-dotnet-instrumentation'
+
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          role-to-assume: ${{ secrets.E2E_IAD_TEST_ACCOUNT_ARN }}
+          aws-region: us-east-1
+
+      - name: Retrieve account
+        uses: aws-actions/aws-secretsmanager-get-secrets@v1
+        with:
+          secret-ids:
+            ACCOUNT_ID, region-account/${{ matrix.aws-region }}
+
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          role-to-assume: arn:aws:iam::${{ env.ACCOUNT_ID }}:role/${{ secrets.E2E_TEST_ROLE_ARN }}
+          aws-region: ${{ matrix.aws-region }}
+
       - name: Setup .NET
         uses: actions/setup-dotnet@v2
         with:
           dotnet-version: '8.0.x'
+
+      - name: Setup .NET Lambda Tools
+        shell: bash
+        run: dotnet tool install -g Amazon.Lambda.Tools
+        working-directory: sample-applications/lambda-test-apps/SimpleLambdaFunction
+
       - name: Build Lambda Sample App
         shell: bash
         run: dotnet lambda package -pl ./src/SimpleLambdaFunction
         working-directory: sample-applications/lambda-test-apps/SimpleLambdaFunction
-
-      - name: Upload to Lambda Sample App to S3
+      
+      - name: Upload Lambda Sample App to S3
         working-directory: sample-applications/lambda-test-apps/SimpleLambdaFunction
-        run: aws s3api put-object --bucket aws-appsignals-sample-app-prod-${{ matrix.aws-region }} --body ./src/SimpleLambdaFunction/bin/Release/net8.0/SimpleLambdaFunction.zip --key dotnet-function.zip
-
-
+        run: aws s3api put-object --bucket aws-appsignals-sample-app-prod-${{ matrix.aws-region }} --body ./src/SimpleLambdaFunction/bin/Release/net8.0/SimpleLambdaFunction.zip --key dotnet-function.zip