Restore .config after dualbank test

Author: danielinux

.github/workflows/test-sunnyday-simulator.yml

@@ -97,13 +97,19 @@ jobs:
       - name: Build wolfboot.elf (dualbank simulator)
         run: |
           make clean
+          mv .config .config.orig
           cp config/examples/sim-dualbank.config .config
           make test-sim-internal-flash-with-update
 
       - name: Run dualbank swap simulation
         run: |
           tools/scripts/sim-dualbank-swap-update.sh
-
+      
+      - name: Cleanup before WOLFBOOT_SMALL_STACK test
+        run: |
+          make keysclean
+          mv .config.orig .config
+      
       - name: Build wolfboot.elf (ECC256, WOLFBOOT_SMALL_STACK)
         run: |
           make clean && make test-sim-internal-flash-with-update SIGN=ECC256 WOLFBOOT_SMALL_STACK=1 SPMATH=1