Setup a nightly build job

* Renaming workflow file to "test.yml" so we can share the setup, using
  the event_name to decide if full test matrix should be run or not
* Run insiders nightly

Issue: swiftlang#934

.github/workflows/tests.yml

@@ -0,0 +1,79 @@
+name: Pull request
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+  schedule:
+    cron: "0 0 * * *"
+
+env:
+  LINUX_ENV_VARS: |
+    NODE_VERSION=v18.19.0
+    NODE_PATH=/usr/local/nvm/versions/node/v18.19.0/bin
+    NVM_DIR=/usr/local/nvm
+    CI=1
+    VSCODE_TEST=1
+    FAST_TEST_RUN=${{ github.event_name == 'schedule' && '1' || '0' }}
+  LINUX_PRE_BUILD_COMMAND: |
+    apt-get update && apt-get install -y rsync curl gpg libasound2 libgbm1 libgtk-3-0 libnss3 xvfb build-essential
+    mkdir -p $NVM_DIR
+    curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash
+    /bin/bash -c "source $NVM_DIR/nvm.sh && nvm install $NODE_VERSION"
+    echo "$NODE_PATH" >> $GITHUB_PATH
+  WINDOWS_ENV_VARS: |
+    CI=1
+    VSCODE_TEST=1
+    FAST_TEST_RUN=${{ github.event_name == 'schedule' && '1' || '0' }}
+  WINDOWS_PRE_BUILD_COMMAND: |
+    .github\workflows\scripts\windows\install-nodejs.ps1
+
+jobs:
+  tests:
+    name: Test
+    uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
+    with:
+      # Linux
+      linux_exclude_swift_versions: '[{"swift_version": "nightly-main"}]'
+      linux_env_vars: $LINUX_ENV_VARS
+      linux_pre_build_command: $LINUX_PRE_BUILD_COMMAND
+      linux_build_command: ./docker/test.sh
+      # Windows
+      windows_exclude_swift_versions: '[{"swift_version": "nightly"}]'
+      windows_env_vars: $WINDOWS_ENV_VARS
+      windows_pre_build_command: $WINDOWS_PRE_BUILD_COMMAND
+      windows_build_command: docker\test-windows.ps1
+      enable_windows_docker: false
+
+  tests_insiders:
+    name: Test
+    uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
+    # if: github.event.schedule
+    with:
+      # Linux
+      linux_exclude_swift_versions: '[{"swift_version": "nightly-main"}]'
+      linux_env_vars: |
+        $LINUX_ENV_VARS
+        VSCODE_VERSION="insiders"
+      linux_pre_build_command: $LINUX_PRE_BUILD_COMMAND
+      linux_build_command: ./docker/test.sh
+      # Windows
+      windows_exclude_swift_versions: '[{"swift_version": "nightly"}]'
+      windows_env_vars: |
+        $WINDOWS_ENV_VARS
+        VSCODE_VERSION="insiders"
+      windows_pre_build_command: $WINDOWS_PRE_BUILD_COMMAND
+      windows_build_command: docker\test-windows.ps1
+      enable_windows_docker: false
+
+  soundness:
+    name: Soundness
+    uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main
+    with:
+      # Pending https://github.com/swiftlang/vscode-swift/pull/1176
+      license_header_check_enabled: false
+      license_header_check_project_name: "VS Code Swift"
+      api_breakage_check_enabled: false
+      docs_check_enabled: false
+      format_check_enabled: false
+      shell_check_enabled: true
+      unacceptable_language_check_enabled: true