Do not allow attach in release mode, as there is not VM Service to connect to. Observed in crash reporting as thrown string which is changed to exception below.
The train command does nothing and was originally added to provide a no-output default for generating app-jit snapshots. The inject-plugins command is only for a repo-only analysis check, which is not necessary since we regenerate during pub get.
#29805
Integration tests must only go through the real file system/process manager/platform. The global indirection makes this code harder to understand than if it directly referred to the concrete instances that are being used.
Update the integration shard to use a const instance of a LocalFIleSystem, LocalProcessManager, and LocalPlatform. Remove global usage and apply testWithoutContext.
This command was previously used by the re-entrant build scripts in xcode_backend.sh and build.gradle. These have since been refactored to use flutter assemble.
Deprecation the command in preparation for removal in a future release of flutter. The only current use is a test on HHH
