ci: move all cross compilation tests to Linux

The idea here is as follows:
  - Run all Linux and cross compilation tests in the asser-test-linux
    job.
  - Only run native tests on MacOS and Windows.

This reduces testing time on MacOS and Windows, which are generally more
expensive in CI. Also, by not duplicating tests in Windows and MacOS we
can reduce overall CI usage a bit.

I've also changed the assert-test-linux job a bit to so that the tests
that are more likely to break and the tests that are only run in
assert-test-linux are run first.

.github/workflows/windows.yml

@@ -15,11 +15,6 @@ jobs:
         uses: actions/setup-go@v2
         with:
           go-version: '1.17'
-      - name: Install QEMU
-        shell: bash
-        run: |
-          choco install qemu --version=2020.06.12
-          echo "C:\Program Files\QEMU" >> $GITHUB_PATH
       - name: Install Ninja
         shell: bash
         run: |
@@ -78,7 +73,7 @@ jobs:
         run: make binaryen
       - name: Test TinyGo
         shell: bash
-        run: make test
+        run: make test GOTESTFLAGS="-v -short"
       - name: Build TinyGo release tarball
         run: make build/release -j4
       - name: Make release artifact