Orca: Add orca ray ctx example to run on self hosted (#5484)

* Add orca ray ctx example in github workflows

* Install cmake 3.16.3 with pip

* Increase the CPU limits

* Add newline at EOF

* Align with the new format

* Add the pull_request trigger

* Add missing property

* Uninstall spark first

* Uninstall spark3

* Remove test triggers

* Add tests to PR_validation

* Fix a bug

* Test the validation trigger

* Undo the change

.github/actions/orca-ray-ctx-example-action/action.yml

@@ -0,0 +1,43 @@
+name: 'Run Orca Ray Ctx Example'
+description: 'Run Orca Ray Ctx Example'
+runs:
+  using: "composite"
+  steps:
+    - name: Setup Env
+      shell: bash
+      run: |
+        apt-get update
+        apt-get install wget
+    
+    - name: Set up Python 
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.7.11'
+
+    - name: Install dependencies
+      shell: bash
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install --upgrade setuptools==58.0.4
+
+        pip uninstall -y bigdl-friesian bigdl-friesian-spark3 bigdl-dllib bigdl-dllib-spark3 bigdl-orca pyspark bigdl-orca-spark3 bigdl-chronos bigdl-chronos-spark3 bigdl-friesian bigdl-friesian-spark3
+        pip uninstall -r python/orca/dev/example/requirements-ray.txt -y
+        pip install -i https://pypi.tuna.tsinghua.edu.cn/simple -r python/orca/dev/example/requirements-ray.txt 
+        pip install pytest
+
+        pip install cmake==3.16.3
+        pip install tensorflow==2.3.0
+        HOROVOD_WITH_TENSORFLOW=1; HOROVOD_WITH_GLOO=1; pip install --no-cache-dir horovod==0.19.2
+
+        pip install ray==1.11.0
+        pip install --pre --upgrade bigdl-orca
+        
+    - name: Run Test
+      shell: bash
+      run: |
+        export SPARK_LOCAL_HOSTNAME=localhost
+        chmod a+x python/orca/dev/example/run-example-test-ray-runtime.sh
+        python/orca/dev/example/run-example-test-ray-runtime.sh
+      env:
+        BIGDL_ROOT: ${{ github.workspace }}
+        ANALYTICS_ZOO_ROOT: ${{ github.workspace }}

.github/workflows/PR_validation.yml

@@ -7,13 +7,17 @@ on:
       - '.github/actions/friesian-scala-ut-action/action.yml'
       - 'scala/dllib/**'
       - '.github/actions/dllib-scala-ut-action/action.yml'
+      - 'python/orca/**'
+      - '.github/actions/orca-ray-ctx-example-action/action.yml'
   pull_request:
     branches: [ main ]
     paths:
       - 'scala/friesian/**'
       - '.github/actions/friesian-scala-ut-action/action.yml'
       - 'scala/dllib/**'
       - '.github/actions/dllib-scala-ut-action/action.yml'
+      - 'python/orca/**'
+      - '.github/actions/orca-ray-ctx-example-action/action.yml'
 
 permissions:
   contents: read
@@ -26,6 +30,7 @@ jobs:
     outputs:
       friesian: ${{ steps.filter.outputs.friesian }}
       dllib: ${{ steps.filter.outputs.dllib }}
+      orca: ${{ steps.filter.outputs.orca }}
     steps:
       - uses: actions/checkout@v3
       - uses: dorny/paths-filter@v2
@@ -38,6 +43,9 @@ jobs:
             dllib:
               - 'scala/dllib/**'
               - '.github/actions/dllib-scala-ut-action/action.yml'
+            orca:
+              - 'python/orca/**'
+              - '.github/actions/orca-ray-ctx-example-action/action.yml'
 
   
   Friesian-Scala-UT:
@@ -67,4 +75,19 @@ jobs:
       - name: Set up maven
         uses: ./.github/actions/maven-setup-action
       - name: Run test
-        uses: ./.github/actions/dllib-scala-ut-action
+        uses: ./.github/actions/dllib-scala-ut-action
+
+
+  Orca-Ray-Ctx-Example:
+    needs: changes
+    if: ${{ needs.changes.outputs.orca == 'true' }}
+    runs-on: [self-hosted, Gondolin-resources, ubuntu-20.04-lts]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up JDK8
+      uses: ./.github/actions/jdk-setup-action
+    - name: Set up maven
+      uses: ./.github/actions/maven-setup-action
+    - name: Run test
+      uses: ./.github/actions/orca-ray-ctx-example-action

.github/workflows/nightly_test.yml

@@ -1,7 +1,6 @@
 name: Nightly Test
 
 on:
-  #pull_request:
   schedule:
     - cron: '0 13 * * *' # GMT time, 13:00 GMT == 21:00 China
   workflow_dispatch:
@@ -21,6 +20,7 @@ on:
         - Dllib-Scala-UT
         - Friesian-Scala-UT
         - PPML-Scala-UT
+        - Orca-Ray-Ctx-Example
 
 permissions:
   contents: read
@@ -152,18 +152,16 @@ jobs:
         uses: ./.github/actions/maven-setup-action
       - name: Run test
         uses: ./.github/actions/ppml-scala-ut-action
-
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+  Orca-Ray-Ctx-Example:
+    if: ${{ github.event.schedule || github.event.inputs.artifact == 'Orca-Ray-Ctx-Example' || github.event.inputs.artifact == 'all' }} 
+    runs-on: [self-hosted, Gondolin-resources, ubuntu-20.04-lts]
 
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up JDK8
+      uses: ./.github/actions/jdk-setup-action
+    - name: Set up maven
+      uses: ./.github/actions/maven-setup-action
+    - name: Run test
+      uses: ./.github/actions/orca-ray-ctx-example-action