github: also do tinygo-test-wasi-fast on windows

.github/workflows/windows.yml

@@ -71,6 +71,9 @@ jobs:
       - name: Build wasi-libc
         if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
         run: make wasi-libc
+      - name: Install wasmtime
+        run: |
+          scoop install wasmtime
       - name: Test TinyGo
         shell: bash
         run: make test GOTESTFLAGS="-v -short"
@@ -96,3 +99,5 @@ jobs:
         run: make smoketest TINYGO=$(PWD)/build/tinygo AVR=0 XTENSA=0
       - name: Test stdlib packages
         run: make tinygo-test
+      - name: Test stdlib packages on wasi
+        run: make tinygo-test-wasi-fast