feat(CI): Use private RPCs for Ethereum and Sepolia env-tests (#5068)

### Description

- Add private RPCs for Ethereum and Sepolia env-tests
- Support automatic retries for failed env-tests

### Testing

Manual

.github/workflows/test.yml

@@ -300,6 +300,8 @@ jobs:
     env:
       MAINNET3_ARBITRUM_RPC_URLS: ${{ secrets.MAINNET3_ARBITRUM_RPC_URLS }}
       MAINNET3_OPTIMISM_RPC_URLS: ${{ secrets.MAINNET3_OPTIMISM_RPC_URLS }}
+      MAINNET3_ETHEREUM_RPC_URLS: ${{ secrets.MAINNET3_ETHEREUM_RPC_URLS }}
+      TESTNET4_SEPOLIA_RPC_URLS: ${{ secrets.TESTNET4_SEPOLIA_RPC_URLS }}
 
     timeout-minutes: 10
     needs: [yarn-install]
@@ -330,8 +332,15 @@ jobs:
       - name: Checkout registry
         uses: ./.github/actions/checkout-registry
 
-      - name: Fork test ${{ matrix.environment }} ${{ matrix.module }} ${{ matrix.chain }} deployment
-        run: cd typescript/infra && ./fork.sh ${{ matrix.environment }} ${{ matrix.module }} ${{ matrix.chain }}
+      - name: Fork test ${{ matrix.environment }} ${{ matrix.module }} ${{ matrix.chain }} deployment with retries
+        uses: nick-fields/retry@v3
+        with:
+          timeout_minutes: 8
+          max_attempts: 3
+          retry_wait_seconds: 30
+          command: cd typescript/infra && ./fork.sh ${{ matrix.environment }} ${{ matrix.module }} ${{ matrix.chain }}
+          on_retry_command: |
+            echo "Test failed, waiting before retry..."
 
   coverage:
     runs-on: ubuntu-latest