Minor fixes on the integration tests (#444)

*Issue description:*
The tests failed to pass due to misconfigurations in the existing test
cases.
*Description of changes:*
1. Update Dotnet EC2 ASG test to use latest artifacts for CWA
integration test.
2. Fix the download URL for CWA integration test.

Changes verified in
https://github.com/aws/amazon-cloudwatch-agent/actions/runs/17629397593/job/50160418081.

---------

Co-authored-by: Mahad Janjua <134644284+majanjua-amzn@users.noreply.github.com>

Author: bjrara

.github/workflows/dotnet-ec2-asg-test.yml

@@ -93,8 +93,7 @@ jobs:
             # Get staging distro file from staging bucket
             echo GET_ADOT_DISTRO_COMMAND="aws s3 cp s3://adot-autoinstrumentation-dotnet-staging/${{ env.ADOT_DISTRO_NAME }} ./${{ env.ADOT_DISTRO_NAME }} && unzip -d dotnet-distro ${{ env.ADOT_DISTRO_NAME }}" >> $GITHUB_ENV
           else
-            # After Release will switch to latest tag instead of hard code version for canary purpose
-            echo GET_ADOT_DISTRO_COMMAND="wget -O aws-distro-opentelemetry-dotnet-instrumentation-linux-glibc-x64.zip https://github.com/aws-observability/aws-otel-dotnet-instrumentation/releases/download/v1.2.0/aws-distro-opentelemetry-dotnet-instrumentation-linux-glibc-x64.zip && unzip -d dotnet-distro aws-distro-opentelemetry-dotnet-instrumentation-linux-glibc-x64.zip" >> $GITHUB_ENV
+            echo GET_ADOT_DISTRO_COMMAND="wget -O aws-distro-opentelemetry-dotnet-instrumentation-linux-glibc-x64.zip https://github.com/aws-observability/aws-otel-dotnet-instrumentation/releases/latest/download/aws-distro-opentelemetry-dotnet-instrumentation-linux-glibc-x64.zip && unzip -d dotnet-distro aws-distro-opentelemetry-dotnet-instrumentation-linux-glibc-x64.zip" >> $GITHUB_ENV
           fi
 
       - name: Set Get CW Agent command environment variable

.github/workflows/java-ec2-ubuntu-test.yml

@@ -100,7 +100,7 @@ jobs:
       - name: Set Get CW Agent command environment variable
         run: |
           if [ "${{ github.event.repository.name }}" = "amazon-cloudwatch-agent" ]; then
-            echo GET_CW_AGENT_DEB_COMMAND= "aws s3 cp s3://${{ secrets.S3_INTEGRATION_BUCKET }}/integration-test/binary/${{ github.sha }}/ubuntu/amd64/latest/amazon-cloudwatch-agent.deb ./cw-agent.deb" >> $GITHUB_ENV
+            echo GET_CW_AGENT_DEB_COMMAND= "aws s3 cp s3://${{ secrets.S3_INTEGRATION_BUCKET }}/integration-test/binary/${{ github.sha }}/linux/amd64/amazon-cloudwatch-agent.deb ./cw-agent.deb" >> $GITHUB_ENV
           else
             echo GET_CW_AGENT_DEB_COMMAND="wget -O cw-agent.deb https://amazoncloudwatch-agent-${{ inputs.aws-region }}.s3.${{ inputs.aws-region }}.amazonaws.com/ubuntu/amd64/latest/amazon-cloudwatch-agent.deb" >> $GITHUB_ENV
           fi