Set up testing and wheels for Windows on GitHub Actions (#8131)

* Move some Java tests into ci.sh

* Move C++ worker tests into ci.sh

* Define run()

* Prepare to move Python tests into ci.sh

* Fix issues in install-dependencies.sh

* Reload environment for GitHub Actions

* Move wheels to ci.sh and fix related issues

* Don't bypass failures in install-ray.sh anymore

* Make CI a little quieter

* Move linting into ci.sh

* Add vitals test right after build

* Fix os.uname() unavailability on Windows

Co-authored-by: Mehrdad <noreply@github.com>

.github/workflows/main.yml

@@ -18,7 +18,11 @@ jobs:
           - name: macos
             os: macos-10.15
     env:
+      GITHUB_PULL_REQUEST: ${{ github.event.number }}
       PYTHON: 3.6
+      TRAVIS_BUILD_DIR: ${{ github.workspace }}
+      TRAVIS_COMMIT: ${{ github.sha }}
+      #TRAVIS_PULL_REQUEST is defined in the scripts to account for "false"
     steps:
     - name: Pre-checkout system configuration
       # We add -l to process .bashrc, but need -e -o pipefail for consistency with GitHub Actions's default behavior.
@@ -40,9 +44,17 @@ jobs:
       env:
         BAZEL_CACHE_CREDENTIAL_B64: ${{ secrets.BAZEL_CACHE_CREDENTIAL_B64 }}
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        #LINUX_WHEELS: 1
+        LINT: 1
+        #MAC_WHEELS: 1
+        RAY_DEFAULT_BUILD: 1
+        WINDOWS_WHEELS: 1
       run: |
         . ./ci/travis/ci.sh init
+        . ./ci/travis/ci.sh lint
         . ./ci/travis/ci.sh build
+        . ./ci/travis/ci.sh test_python
+        . ./ci/travis/ci.sh test_wheels
     - name: Run Clang Include-What-You-Use
       continue-on-error: true
       if: runner.os == 'Linux'