Under `sharedWorkspaceLockfile: false` and `injectWorkspacePackages: true`, an
injected workspace dependency is copied into the dependent project and covered
by that project's own install, whereas a dependency declared with the `link:`
protocol remains a symlink whose target project still needs its own install.
- In `pnpm-cli` (`projects_to_verify`) and `pnpm-package-manager`
(`WorkspaceProjectIndex::dep_targets`), keep walking `link:` edges when
`!config.shares_one_lockfile() && config.inject_workspace_packages` instead
of dropping all workspace dependency edges.
- In `@pnpm/workspace.projects-graph`, rewrite `link:` prefixes to `file:`
before passing specs to `@pnpm/npm-package-arg`, which otherwise throws
`EUNSUPPORTEDPROTOCOL` and drops `link:` workspace edges from the project
graph used by `--filter` and `selectProjectsToVerify`.
Closes https://github.com/pnpm/tasks/issues/179