[BUG] skip_validation has no effect on self-hosted macos runner

[modosc]

Describe the bug
this seems like a similar issue as #1771 - i'm unable to run the action on a self-hosted mac because gpg isn't installed. setting skip_validation has no effect.

To Reproduce
in my github workfow:

  test:
    runs-on: [self-hosted, macOS, ARM64]
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
      - name: Setup Flutter
        uses: subosito/flutter-action@v2
        with:
          flutter-version: "3.35.5"
          channel: "stable"
      - name: Run Tests
        run: flutter test --coverage
      - name: Upload results to Codecov
        uses: codecov/codecov-action@v5.5.1
        with:
          # we need to install gpg on our self-hosted mac minis but until then we can skip validation, see
          # https://github.com/codecov/codecov-action/issues/1769
          skip_validation: true
          verbose: true

Expected behavior
i should be able to submit coverage.

Regression
according to #1771 this was fixed so maybe it is a regression

Screenshots
my actual results when running the above:

Run codecov/codecov-action@v5.5.1
  with:
    skip_validation: true
    verbose: true
    disable_file_fixes: false
    disable_search: false
    disable_safe_directory: false
    disable_telem: false
    dry_run: false
    fail_ci_if_error: false
    git_service: github
    gcov_executable: gcov
    handle_no_reports_found: false
    recurse_submodules: false
    run_command: upload-coverage
    use_legacy_upload_endpoint: false
    use_oidc: false
    use_pypi: false
    version: latest
  env:
    ANDROID_KEY_PROPERTIES_BASE64: ***
    ANDROID_UPLOAD_KEYSTORE_BASE64: ***
    ENV_STAGING_JSON_BASE64: ***
    FLUTTER_ROOT: /Users/continuousintegration/github/actions-runner-3/_work/_tool/flutter/stable-3.35.5-arm64
    PUB_CACHE: /Users/continuousintegration/.pub-cache
Run missing_deps=""
  missing_deps=""
  
  # Check for required commands
  for cmd in bash git curl gpg; do
    if ! command -v "$cmd" >/dev/null 2>&1; then
      missing_deps="$missing_deps $cmd"
    fi
  done
  
  # Report missing required dependencies
  if [ -n "$missing_deps" ]; then
    echo "Error: The following required dependencies are missing:$missing_deps"
    echo "Please install these dependencies before using this action."
    exit 1
  fi
  
  echo "All required system dependencies are available."
  shell: /bin/sh -e {0}
  env:
    ANDROID_KEY_PROPERTIES_BASE64: ***
    ANDROID_UPLOAD_KEYSTORE_BASE64: ***
    ENV_STAGING_JSON_BASE64: ***
    FLUTTER_ROOT: /Users/continuousintegration/github/actions-runner-3/_work/_tool/flutter/stable-3.35.5-arm64
    PUB_CACHE: /Users/continuousintegration/.pub-cache
Error: The following required dependencies are missing: gpg
Please install these dependencies before using this action.

Product Area
coverage?

Versions

• OS: macos arm64
• Git Host: GitHub
• CI/CD: GitHub Actions
• Uploader: codecov-action@v5.5.1

Commit and CI link
this is a private repo so i'm unsure this will be useful. see the output i pasted above and please lmk if you need more.

Additional context

[linear]

CCMRG-1847

[modosc]

actually it looks like the bug is here - this code doesn't check to see if skip_validation is set so it always errors out when gpg isn't available.