Refactor the if for windows tip e2e to job level

Instead of checking at each step, just check once at the job level and
skip the job run for Windows tip e2e.

.github/workflows/e2e.yml

@@ -16,22 +16,21 @@ defaults:
 
 jobs:
   test:
+    if: matrix.go != 'tip' || matrix.platform != 'windows-latest'
     strategy:
       matrix:
         go: [stable, tip]
         platform: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Checkout code
-        if: matrix.go != 'tip' || matrix.platform != 'windows-latest'
         uses: actions/checkout@v2
       - name: Install Go
-        if: matrix.go != 'tip' || matrix.platform != 'windows-latest'
         uses: actions/setup-go@v2
         with:
           go-version: 1.x
       - name: Install Go tip
-        if: matrix.go == 'tip' && matrix.platform != 'windows-latest'
+        if: matrix.go == 'tip'
         run: |
           go install golang.org/dl/gotip@latest
           gotip download
@@ -40,10 +39,8 @@ jobs:
           echo "$HOME/go/bin" >> "$GITHUB_PATH"
           echo "$HOME/sdk/gotip/bin" >> "$GITHUB_PATH"
       - name: Install xk6
-        if: matrix.go != 'tip' || matrix.platform != 'windows-latest'
         run: go install go.k6.io/xk6/cmd/xk6@master
       - name: Build extension
-        if: matrix.go != 'tip' || matrix.platform != 'windows-latest'
         run: |
           which go
           go version
@@ -53,7 +50,6 @@ jobs:
             --with github.com/grafana/xk6-browser=.
           ./k6extension version
       - name: Run E2E tests
-        if: matrix.go != 'tip' || matrix.platform != 'windows-latest'
         run: |
           set -x
           if [ "$RUNNER_OS" == "Linux" ]; then
@@ -68,6 +64,5 @@ jobs:
             ./k6extension run "$f"
           done
       - name: Check screenshot
-        if: matrix.go != 'tip' || matrix.platform != 'windows-latest'
         # TODO: Do something more sophisticated?
         run: test -s screenshot.png