Update CI workflows to use Xcode setup action and remove experimental prebuilts flag

Author: artemisia-absynthium

.github/workflows/codeql.yml

@@ -64,6 +64,9 @@ jobs:
     # or others). This is typically only required for manual builds.
     # - name: Setup runtime (example)
     #   uses: actions/setup-example@v1
+    - uses: maxim-lobanov/setup-xcode@v1
+      with:
+        xcode-version: '26.0-beta'
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
@@ -86,7 +89,7 @@ jobs:
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
     - if: matrix.build-mode == 'manual'
-      run: swift build -v --enable-experimental-prebuilts
+      run: swift build -v
 
     - name: Perform CodeQL Analysis
       uses: github/codeql-action/analyze@v3

.github/workflows/swift.yml

@@ -15,8 +15,11 @@ jobs:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v5
+    - uses: maxim-lobanov/setup-xcode@v1
+      with:
+        xcode-version: '26.0-beta'
     - name: Run tests
-      run: swift test -v --enable-code-coverage --enable-experimental-prebuilts
+      run: swift test -v --enable-code-coverage
     - name: Export coverage report as Lcov
       run: xcrun llvm-cov export -format="lcov" -instr-profile=.build/arm64-apple-macosx/debug/codecov/default.profdata .build/arm64-apple-macosx/debug/ShitLibPackageTests.xctest/Contents/MacOS/ShitLibPackageTests > lcov.info
     - uses: codecov/codecov-action@v5