Add emld tool and use clang to drive linking - #27866

View CircleCI Workflow

• test-wasm2js1 - Failed
• test-browser-chrome - Failed
• test-windows - Failed
• test-bun - Failed
• test-node-compat - Failed
• test-spidermonkey - Failed
• test-core3 - Failed
• test-browser-chrome-wasm64 - Failed
• test-browser-chrome-wasm64-4gb - Failed
• test-core0 - Failed
• test-wasm64-4gb - Failed
• test-browser-chrome-2gb - Failed
• test-wasm64-misc - Failed
• test-browser-firefox - Failed
• test-esm-integration - Failed
• test-modularize-instance - Failed
• test-linux-arm64 - Failed
• test-sanity - Failed
• test-mac-arm64 - Failed
• test-core2 - Failed
• test-other - Failed
• test-deno - Failed
• test-windows-browser-firefox - Failed
• test-browser-firefox-wasm64 - Failed
• build-docs - Success
• eslint - Success
• test-sockets-chrome - Success
• test-posixtest - Success
• test-stress - Success
• test-browser-chrome-emrun - Success
• build-linux - Success
• test-jsc - Success
• vulture - Success
• ruff - Success
• mypy - Success