Convert shell scripts to dart scripts

[CoderDake]

Look into converting the following over to dart scripts:

All the CI scripts under tool/ci:

• benchmark_performance.sh
• benchmark_size.sh
• bots.sh
• package_tests.sh
• setup.sh

All other scripts:

• build_release.sh - replaced by devtools_tool build-release
• fix_goldens.sh - replaced by devtools_tool fix-goldens --run-id 12345
• flutter_tests.sh (no longer exists). We have remaining bash scripts under flutter_customer_tests but these do not need to be run on Windows right now.
• generate_code.sh - Migrate generate_code.sh to devtools_tool for Windows compatibility #6579
• latest_flutter_candidate.sh
• pub_upgrade.sh - replaced by devtools_tool pub-get --upgrade
• pull_and_refresh.sh - replaced by devtools_tool sync
• refresh.sh - replaced by devtools_tool generate-code --upgrade
• release_helper.sh
• tag_version.sh - replaced by devtools_tool tag-version
• update_flutter_sdk.sh - replaced by devtools_tool update-flutter-sdk [--local] [--no-use-cache]
• update_perfetto.sh - replaced by devtools_tool update-perfetto
• upgrade.sh - replaced by the pub-get command: devtools_tool pub-get --only-main --upgrade
• build_e2e.dart should also be moved into devtools_tool for consistency
  • this has been replaced by devtools_tool serve