ci: add new workflow, for doing the slower tests in vpm specifically …

…with `-d network` (#20177)

.github/workflows/vpm_ci.yml

@@ -0,0 +1,70 @@
+name: VPM CI
+
+on:
+  push:
+    paths:
+      - '**/vpm_ci.yml'
+      - '**/cmd/tools/vpm/**'
+  pull_request:
+    paths:
+      - '**/vpm_ci.yml'
+      - '**/cmd/tools/vpm/**'
+
+concurrency:
+  group: vpm-ci-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  setup:
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, windows-2019, macos-12]
+      fail-fast: false
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          path: vlang
+      - name: Build V
+        if: runner.os != 'Windows'
+        run: cd vlang && make -j4 && ./v doctor
+      - name: Build V (Windows)
+        if: runner.os == 'Windows'
+        run: cd vlang && ./make.bat && ./v doctor
+      - name: Cache V
+        uses: actions/cache/save@v3
+        with:
+          path: vlang
+          key: ${{ runner.os }}-${{ github.sha }}
+
+  test:
+    needs: setup
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-20.04
+            cc: tcc
+          - os: ubuntu-20.04
+            cc: gcc
+          - os: ubuntu-20.04
+            cc: clang
+          - os: windows-2019
+            cc: tcc
+          - os: windows-2019
+            cc: gcc
+          - os: windows-2019
+            cc: msvc
+          - os: macos-12
+            cc: clang
+      fail-fast: false
+    runs-on: ${{ matrix.os }}
+    env:
+      VFLAGS: -cc ${{ matrix.cc }} -d network
+    steps:
+      - name: Restore V cache
+        uses: actions/cache/restore@v3
+        with:
+          path: vlang
+          key: ${{ runner.os }}-${{ github.sha }}
+      - name: Test
+        run: cd vlang && ./v test cmd/tools/vpm