Revert workflow to AWS secret key authentication (keep Lambda fixes)

Keep the Lambda improvements:
- Pricing API retry logic with exponential backoff and fallback
- Stopper Lambda error handling for missing InstanceId/volume_id

Only revert the workflow authentication method back to AWS secret keys
to test if credentials are properly configured in GitHub Secrets.

Author: harshavemula-ua

.github/workflows/infra_deploy_val.yaml

@@ -30,7 +30,6 @@ jobs:
     name: Generate VPU Execution Files
     runs-on: ubuntu-latest
     permissions:
-      id-token: write
       contents: read
     steps:
     - name: Checkout code
@@ -49,12 +48,12 @@ jobs:
         pip install --upgrade awscli
         pip install --upgrade awscli boto3 pandas
 
-    - name: Configure AWS Credentials (OIDC)
+    - name: Configure AWS Credentials
       uses: aws-actions/configure-aws-credentials@v4
       with:
-        role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
+        aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+        aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
         aws-region: ${{ env.AWS_REGION }}
-        role-session-name: GitHubActions-GenerateExecutions
 
 
     - name: Generate execution files
@@ -83,7 +82,6 @@ jobs:
     permissions:
       contents: read
       pull-requests: write
-      id-token: write
       security-events: write
 
     steps:
@@ -103,12 +101,12 @@ jobs:
         pip install --upgrade awscli
         pip install --upgrade awscli boto3 pandas
 
-    - name: Configure AWS Credentials (OIDC)
+    - name: Configure AWS Credentials
       uses: aws-actions/configure-aws-credentials@v4
       with:
-        role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
+        aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+        aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
         aws-region: ${{ env.AWS_REGION }}
-        role-session-name: GitHubActions-TerraformCheck
 
     - name: Setup Terraform
       uses: hashicorp/setup-terraform@v3
@@ -237,7 +235,6 @@ jobs:
 
     permissions:
       contents: read
-      id-token: write
 
     steps:
     - name: Checkout code
@@ -255,12 +252,12 @@ jobs:
         pip install --upgrade pip
         pip install --upgrade awscli boto3 pandas
 
-    - name: Configure AWS Credentials (OIDC)
+    - name: Configure AWS Credentials
       uses: aws-actions/configure-aws-credentials@v4
       with:
-        role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
+        aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+        aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
         aws-region: ${{ env.AWS_REGION }}
-        role-session-name: GitHubActions-TerraformApply
 
     - name: Generate execution files
       working-directory: infra/aws
@@ -342,7 +339,6 @@ jobs:
       matrix:
         vpu: ["01", "02", "03N", "03S", "03W", "04", "05", "06", "07", "08", "09", "10L", "10U", "11", "12", "13", "14", "15", "16", "17", "18"]
     permissions:
-      id-token: write
       contents: read
 
     env:
@@ -355,13 +351,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Configure AWS Credentials (OIDC)
+      - name: Configure AWS Credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
-          role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           aws-region: ${{ env.AWS_REGION }}
-          role-session-name: GitHubActions-TestVPU-${{ matrix.vpu }}
-          role-duration-seconds: 7200  # 2 hours
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -536,7 +531,6 @@ jobs:
       matrix:
         vpu: ["01", "02", "03N", "03S", "03W", "04", "05", "06", "07", "08", "09", "10L", "10U", "11", "12", "13", "14", "15", "16", "17", "18"]
     permissions:
-      id-token: write
       contents: read
 
     env:
@@ -549,13 +543,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Configure AWS Credentials (OIDC)
+      - name: Configure AWS Credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
-          role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           aws-region: ${{ env.AWS_REGION }}
-          role-session-name: GitHubActions-TestVPU-${{ matrix.vpu }}
-          role-duration-seconds: 7200  # 2 hours
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -731,18 +724,17 @@ jobs:
 
     permissions:
       contents: read
-      id-token: write
 
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Configure AWS Credentials (OIDC)
+      - name: Configure AWS Credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
-          role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           aws-region: ${{ env.AWS_REGION }}
-          role-session-name: GitHubActions-TerraformDestroy
 
       - name: Setup Terraform
         uses: hashicorp/setup-terraform@v3