rust examples should be tested

[jmayclin]

Problem:

Our Rust examples should be run in CI to confirm that they still successfully operate. We have had cases in the past where our "normal" CI missed regressions that our examples actually would have caught.

Solution:

1. invoke CI though commands and check for a non-zero exit code.
2. some examples are already written as tests, this pattern could be more widely adopted.

Requirements / Acceptance Criteria:

If a PR breaks an example, CI should fail.