add grpc_distribtests_python for windows (#29153)

tools/internal_ci/windows/grpc_distribtests_python.bat

@@ -0,0 +1,49 @@
+@rem Copyright 2022 The gRPC Authors
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem     http://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+
+@rem Avoid slow finalization after the script has exited.
+@rem See the script's prologue for info on the correct invocation pattern.
+setlocal EnableDelayedExpansion
+IF "%cd%"=="T:\src" (
+  call %~dp0\..\..\..\tools\internal_ci\helper_scripts\move_src_tree_and_respawn_itself.bat %0
+  echo respawn script has finished with exitcode !errorlevel!
+  exit /b !errorlevel!
+)
+endlocal
+
+@rem enter repo root
+cd /d %~dp0\..\..\..
+
+set PREPARE_BUILD_INSTALL_DEPS_PYTHON=true
+call tools/internal_ci/helper_scripts/prepare_build_windows.bat || exit /b 1
+
+@rem Build all python windows artifacts
+python tools/run_tests/task_runner.py -f artifact windows python %TASK_RUNNER_EXTRA_FILTERS% -j 4 --inner_jobs 4 -x build_artifacts_python/sponge_log.xml || set FAILED=true
+
+@rem the next step expects to find the artifacts from the previous step in the "input_artifacts" folder.
+bash -c "rm -rf input_artifacts; mkdir -p input_artifacts; cp -r artifacts/* input_artifacts/ || true"
+
+@rem Collect the python artifact from subdirectories of input_artifacts/ to artifacts/
+@rem TODO(jtattermusch): when collecting the artifacts that will later be uploaded as kokoro job artifacts,
+@rem potentially skip some file names that would clash with linux-created artifacts.
+bash -c "cp -r input_artifacts/python_*/* artifacts/ || true"
+
+@rem TODO(jtattermusch): Here we would normally run python windows distribtests, but currently no such tests are defined
+@rem in distribtest_targets.py
+
+bash tools/internal_ci/helper_scripts/store_artifacts_from_moved_src_tree.sh
+
+if not "%FAILED%" == "" (
+  exit /b 1
+)

tools/internal_ci/windows/grpc_distribtests_python.cfg

@@ -0,0 +1,26 @@
+# Copyright 2022 The gRPC Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/windows/grpc_distribtests_python.bat"
+timeout_mins: 120
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.*"
+    regex: "github/grpc/reports/**"
+    regex: "github/grpc/artifacts/**"
+  }
+}

tools/internal_ci/windows/pull_request/grpc_distribtests_python.cfg

@@ -0,0 +1,31 @@
+# Copyright 2022 The gRPC Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/windows/grpc_distribtests_python.bat"
+timeout_mins: 120
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.*"
+    regex: "github/grpc/reports/**"
+    regex: "github/grpc/artifacts/**"
+  }
+}
+
+env_vars {
+  key: "TASK_RUNNER_EXTRA_FILTERS"
+  value: "presubmit"
+}