add linux and windows cpu tests

Summary:
Pull Request resolved: #5299

add linux and windows cpu tests from circleci

Reviewed By: wat3rBro

Differential Revision: D58021661

fbshipit-source-id: 768df812f31520d30354db59a6566c9281130884

.github/actions/install_detectron2_win/action.yml

@@ -0,0 +1,15 @@
+name: "Install Detectron2"
+runs:
+  using: composite
+  steps:
+  - name: Install Detectron2
+    shell: bash
+    run: |
+      # Remove first, in case it's in the CI cache
+      pip uninstall -y detectron2
+
+      pip install --progress-bar off -e .[all]
+      python -m detectron2.utils.collect_env
+
+      # TODO: this command fails because windows does not have wget
+      # ./datasets/prepare_for_tests.sh

.github/actions/install_windows_dep/action.yml

@@ -0,0 +1,24 @@
+name: "Install Dependencies"
+inputs:
+  torch-version:
+    description: torch version to install
+  torchvision-version:
+    description: torch vision version to install, version number or "master"
+  pytorch-index:
+    description: where to install torch from
+    required: false
+    default: "https://download.pytorch.org/whl/torch_stable.html"
+    # use test wheels index to have access to RC wheels
+    # https://download.pytorch.org/whl/test/torch_test.html
+runs:
+  using: composite
+  steps:
+  - name: Install Dependencies
+    shell: bash
+    run: |
+      pip install certifi --ignore-installed  # required on windows to workaround some cert issue
+      pip install numpy cython  # required on windows before pycocotools
+      pip install opencv-python-headless pytest-xdist pycocotools tensorboard onnx
+      pip install -U git+https://github.com/facebookresearch/iopath
+      pip install -U git+https://github.com/facebookresearch/fvcore
+      pip install torch==${{inputs.torch-version}} torchvision==${{inputs.torchvision-version}} -f ${{inputs.pytorch-index}}

.github/actions/run_unittests_win/action.yml

@@ -0,0 +1,8 @@
+name: "Run Unit Tests"
+runs:
+  using: composite
+  steps:
+  - name: Run Unit Tests
+    shell: bash
+    run: |
+      echo TODO: unittest fails for now