[packages] make-deps-path-based should include everything in a federated plugin

[stuartmorgan-g]

Currently the tool logic for make-deps-path-based has logic that was intended to solve the issue of transitive dependencies by having foo/example get all the same overrides as foo. That's usually enough, but not always; in particular, cases where some unrelated plugin's example depends on foo, but the plugin itself doesn't, then the example gets only foo overridden but none of foo's sub-dependencies, which causes CI failures. See flutter/packages#9212 for an example.

The tool should have additional logic that anything depending on foo* gets all overrides in the foo* conceptual plugin group, to avoid missed cases.

(In general the changes to other packages aren't actually necessary at the stage where this causes problems, but having the tool generate partial changes that don't work just causes confusion.)

[Gustl22]

Maybe another reason to use Workspaces, although the implications were already discussed. Just wanted to mention this here as reference.