Add dotnet-version: latest support with dotnet-channel input (#730)

* feat: add dotnet-version: latest keyword with dotnet-channel support (#497)

* restore test-proxy container image

* update e2e-tests.yml and documentation

* fix(tests): correct release-type and support-phase values in latest-version test mocks

.github/workflows/e2e-tests.yml

@@ -649,3 +649,44 @@ jobs:
       - name: Verify dotnet
         shell: pwsh
         run: __tests__/verify-dotnet.ps1 -Patterns "^8.0.416$", "^9.0.308$", "^10.0.101$", "^8.0"
+
+  test-setup-latest-version:
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      fail-fast: false
+      matrix:
+        operating-system: [ubuntu-latest]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Clear toolcache
+        shell: pwsh
+        run: __tests__/clear-toolcache.ps1 ${{ runner.os }}
+      - name: Setup dotnet latest
+        uses: ./
+        with:
+          dotnet-version: latest
+      - name: Verify dotnet
+        shell: pwsh
+        run: __tests__/verify-dotnet.ps1 -Patterns "^\d+\.\d+\.\d+"
+
+  test-setup-latest-with-channel-abcxx:
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      fail-fast: false
+      matrix:
+        operating-system: [macos-latest]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Clear toolcache
+        shell: pwsh
+        run: __tests__/clear-toolcache.ps1 ${{ runner.os }}
+      - name: Setup dotnet latest with A.B.Cxx channel
+        uses: ./
+        with:
+          dotnet-version: latest
+          dotnet-channel: '9.0.1xx'
+      - name: Verify dotnet
+        shell: pwsh
+        run: __tests__/verify-dotnet.ps1 -Patterns "^9\.0\.1\d{2}"