Fix: Refresh AWS Token During Lambda Java Performance Test (#450)

Problem:
The Lambda Java performance test can take longer than one hour, but the
AWS token is only valid for one hour. If the token expires, the
performance test will fail. Additionally, Terraform will fail to delete
the AWS resources it created. When this happens, subsequent performance
tests are blocked because the AWS resources cannot be manually deleted
(attempts to delete them in the AWS Console result in "Access Denied,"
even with admin permissions).

Fix:
In the performance test workflow, we explicitly renew the AWS token
twice:
Before running the performance tests.
Before tearing down the Terraform-created resources.

Author: lukeina2z

.github/workflows/java-lambda-layer-perf-test.yml

@@ -38,7 +38,7 @@ jobs:
       uses: aws-actions/configure-aws-credentials@v4
       with:
         role-to-assume: arn:aws:iam::${{ secrets.APPLICATION_SIGNALS_E2E_TEST_ACCOUNT_ID }}:role/${{ secrets.APPLICATION_SIGNALS_E2E_TEST_ROLE_NAME }}
-        aws-region: us-east-1     
+        aws-region: us-east-1
 
     - name: Checkout aws-otel-java-instrumentation
       uses: actions/checkout@v4
@@ -83,6 +83,13 @@ jobs:
         terraform init
         terraform apply -auto-approve -var "adot_layer_arn=${{ env.LAYER_VERSION_ARN }}"
 
+    # Re-authenticate to refresh credentials (important!)
+    - name: Refresh AWS Credentials
+      uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: arn:aws:iam::${{ secrets.APPLICATION_SIGNALS_E2E_TEST_ACCOUNT_ID }}:role/${{ secrets.APPLICATION_SIGNALS_E2E_TEST_ROLE_NAME }}
+        aws-region: us-east-1
+
     - name: Checkout current repository
       uses: actions/checkout@v4
       with:
@@ -131,6 +138,14 @@ jobs:
             layer_results.txt
         retention-days: 90
 
+    # Always re-authenticate to refresh credentials before cleanup
+    - name: Refresh AWS Credentials before cleanup
+      if: success() || failure() || cancelled()
+      uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: arn:aws:iam::${{ secrets.APPLICATION_SIGNALS_E2E_TEST_ACCOUNT_ID }}:role/${{ secrets.APPLICATION_SIGNALS_E2E_TEST_ROLE_NAME }}
+        aws-region: us-east-1
+
     - name: Cleanup Terraform Resources
       if: success() || failure() || cancelled()
       run: |