COMP: add Linux x64 self-hosted CI for CUDA

.github/workflows/build-test-package.yml

@@ -8,8 +8,13 @@ jobs:
     strategy:
       max-parallel: 3
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-10.15]
+        os: [self-hosted,ubuntu-20.04, windows-2019, macos-10.15]
         include:
+          - os: self-hosted
+            c-compiler: "gcc"
+            cxx-compiler: "g++"
+            itk-git-tag: "v5.2.1"
+            cmake-build-type: "MinSizeRel"
           - os: ubuntu-20.04
             c-compiler: "gcc"
             cxx-compiler: "g++"
@@ -30,6 +35,7 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: Set up Python 3.8
+      if: matrix.os != 'self-hosted'
       uses: actions/setup-python@v2
       with:
         python-version: 3.8
@@ -42,6 +48,14 @@ jobs:
     - name: Get specific version of CMake, Ninja
       uses: lukka/[email protected]
 
+    - name: self-hosted cleanup
+      if: matrix.os == 'self-hosted'
+      shell: bash
+      run: |
+        rm -fr ../ITK
+        rm -fr ../ITK-build
+        rm -fr ../build
+
     - name: Download ITK
       run: |
         cd ..