[ci] Add special build with Clang and libc++ on Linux - #23647

"github.event.pull_request.head.ref" is potentially untrusted. avoid using it directly in inline scripts. instead, pass it through an environment variable. see https://docs.github.com/en/actions/reference/security/secure-use#good-practices-for-mitigating-script-injection-attacks for more details

property "overrides" is not defined in object type {arch: string; is_special: bool; platform: string}

property "overrides" is not defined in object type {arch: string; is_special: bool; platform: string}

label "mac27" is unknown. available labels are "windows-latest", "windows-latest-8-cores", "windows-2025", "windows-2025-vs2026", "windows-2022", "windows-11-arm", "ubuntu-slim", "ubuntu-latest", "ubuntu-latest-4-cores", "ubuntu-latest-8-cores", "ubuntu-latest-16-cores", "ubuntu-24.04", "ubuntu-24.04-arm", "ubuntu-22.04", "ubuntu-22.04-arm", "macos-latest", "macos-latest-xlarge", "macos-latest-large", "macos-26-intel", "macos-26-xlarge", "macos-26-large", "macos-26", "macos-15-intel", "macos-15-xlarge", "macos-15-large", "macos-15", "macos-14-xlarge", "macos-14-large", "macos-14", "self-hosted", "x64", "arm", "arm64", "linux", "macos", "windows", "mac14", "mac15", "mac26", "mac-beta", "cpu", "latest", "preview". if it is a custom label for self-hosted runner, set list of labels in actionlint.yaml config file

shellcheck reported issue in this script: SC2035:info:2:4: Use ./*glob* or -- *glob* so names with dashes won't become options

shellcheck reported issue in this script: SC2012:info:3:9: Use find instead of ls to better handle non-alphanumeric filenames

shellcheck reported issue in this script: SC2006:style:1:22: Use $(...) notation instead of legacy backticks `...`

shellcheck reported issue in this script: SC2045:warning:9:10: Iterating over ls output is fragile. Use globs

shellcheck reported issue in this script: SC2045:warning:5:10: Iterating over ls output is fragile. Use globs

the runner of "actions/setup-node@v3" action is too old to run on GitHub Actions. update the action's version to fix this issue

⚠️ [actionlint] The command ran successfully and some problem was found (found 49 errors, linted 33 files), exit code: 1