Add test for action in containerized runner

.github/workflows/integ-test-restore-custom-gradle-home.yml

@@ -5,9 +5,6 @@ on:
     inputs:
       cache-key-prefix:
         type: string
-      runner-os:
-        type: string
-        default: '["ubuntu-latest", "windows-latest", "macos-latest"]'
       download-dist:
         type: boolean
         default: false
@@ -19,10 +16,7 @@ env:
 
 jobs:
   seed-build:
-    strategy:
-      matrix:
-        os: ${{fromJSON(inputs.runner-os)}}
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     steps:
     - name: Set Gradle User Home
       run: |
@@ -43,10 +37,7 @@ jobs:
   # Test that the gradle-user-home cache will cache dependencies, by running build with --offline
   dependencies-cache:
     needs: seed-build
-    strategy:
-      matrix:
-        os: ${{fromJSON(inputs.runner-os)}}
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     steps:
     - name: Set Gradle User Home
       run: |
@@ -67,10 +58,7 @@ jobs:
   # Test that the gradle-user-home cache will cache and restore local build-cache
   build-cache:
     needs: seed-build
-    strategy:
-      matrix:
-        os: ${{fromJSON(inputs.runner-os)}}
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     steps:
     - name: Set Gradle User Home
       run: |