Only run setup for the language under test

.github/workflows/build.yml

@@ -270,6 +270,7 @@ jobs:
     - name: Unshallow clone for tags
       run: git fetch --prune --unshallow --tags
     - name: Install Go
+      if: ${{ matrix.language == 'go' }}
       uses: actions/setup-go@v2
       with:
         go-version: ${{matrix.goversion}}
@@ -280,19 +281,23 @@ jobs:
     - name: Install Pulumi CLI
       uses: pulumi/action-install-pulumi-cli@v2
     - name: Setup Node
+      if: ${{ matrix.language == 'nodejs' }}
       uses: actions/setup-node@v2
       with:
         node-version: ${{matrix.nodeversion}}
         registry-url: https://registry.npmjs.org
     - name: Setup DotNet
+      if: ${{ matrix.language == 'dotnet' }}
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: ${{matrix.dotnetversion}}
     - name: Setup Python
+      if: ${{ matrix.language == 'python' }}
       uses: actions/setup-python@v2
       with:
         python-version: ${{matrix.pythonversion}}
     - name: Setup Java
+      if: ${{ matrix.language == 'java' }}
       uses: actions/setup-java@v3
       with:
         java-version: ${{matrix.javaversion}}