Move a few straggling dependencies to workspace Cargo.toml

[sffc]

As part of the 2.0.0-beta1 release checklist, I found a few crates that have dependencies that aren't in the workspace:

• components/normalizer/fuzz
• ffi/ecma402
• ffi/freertos
• tools/benchmark/macros
• tools/benchmark/memory
• tools/make/diplomat-coverage
• utils/bies
• utils/env_preferences
• utils/potential_utf (dev deps)

Maybe some of these should start using workspace dependencies. For ones that don't, maybe explicitly say that they are excluded in the release checklist.