ci: Fix config bugs in deployment and QC pipelines

- Node is now explicitly setup up with explicit versioning

- AWS login is configured for the deployment step

.github/workflows/deploy-web-app.yml

@@ -1,6 +1,10 @@
 name: Deploy Web app and Infrastructure
 on: workflow_dispatch
 
+permissions: 
+  id-token: write
+  contents: read
+
 jobs:
   main:
     runs-on: ubuntu-20.04
@@ -9,12 +13,24 @@ jobs:
         with:
           submodules: recursive
 
+      - name: Setup Node v20.10
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.10
+
       # We need foundry for contract types
       - name: Install Foundry
         uses: foundry-rs/foundry-toolchain@v1
         with:
           version: nightly
 
+      - name: Setup AWS credentials
+        uses: aws-actions/configure-aws-credentials@v2
+        with:
+          aws-region: ap-south-1
+          role-to-assume: ${{ secrets.AWS_ROLE_TO_ASSUME }}
+          role-session-name: FinthetixDeploymentSession
+
       - name: Install node dependencies
         run: |
           cd web-app/infra

.github/workflows/quality-check.yml

@@ -55,6 +55,11 @@ jobs:
         with:
           version: nightly
 
+      - name: Setup Node v20.10
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.10
+
       - name: Install node dependencies
         run: |
           cd web-app/infra