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:

• [x] build_release.sh - replaced by devtools_tool build-release
• [x] fix_goldens.sh - replaced by devtools_tool fix-goldens --run-id 12345
• [x] ~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.
• [x] generate_code.sh - https://github.com/flutter/devtools/pull/6579
• [ ] latest_flutter_candidate.sh
• [x] pub_upgrade.sh - replaced by devtools_tool pub-get --upgrade
• [x] pull_and_refresh.sh - replaced by devtools_tool sync
• [x] refresh.sh - replaced by devtools_tool generate-code --upgrade
• [x] release_helper.sh
• [x] tag_version.sh - replaced by devtools_tool tag-version
• [x] update_flutter_sdk.sh - replaced by devtools_tool update-flutter-sdk [--local] [--no-use-cache]
• [x] update_perfetto.sh - replaced by devtools_tool update-perfetto
• [x] upgrade.sh - replaced by the pub-get command: devtools_tool pub-get --only-main --upgrade
• [x] build_e2e.dart should also be moved into devtools_tool for consistency
  • this has been replaced by devtools_tool serve