type-c-services/tests: Convert std/unconstrained example to test

[RobertZ2011]

No description provided.

[Copilot]

Pull request overview

This PR backports and formalizes Type‑C “unconstrained power” behavior by adding an integration test to the type-c-service test harness, adjusting test timing, and cleaning up an outdated std example.

Changes:

• Added a new integration test (tests/unconstrained.rs) validating unconstrained state propagation across multiple Type‑C ports.
• Increased the shared Type‑C integration test timeout window and ensured log feature propagation to power-policy-service for std/test builds.
• Removed the old type-c-unconstrained std example binary and its Cargo bin entry.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
type-c-service/tests/unconstrained.rs	Adds an integration test for unconstrained-power behavior across 3 mocked ports.
type-c-service/tests/common/mod.rs	Extends the default integration test timeout window used by the Type‑C test harness.
type-c-service/Cargo.toml	Ensures power-policy-service/log is enabled when type-c-service is built with log.
examples/std/src/bin/type_c/unconstrained.rs	Removes an obsolete std example that is superseded by the new integration test.
examples/std/Cargo.toml	Removes the type-c-unconstrained bin target entry.