Bump clap from 3.2.4 to 3.2.6 in /src/rust/engine (#15909)

Bumps [clap](https://github.com/clap-rs/clap) from 3.2.4 to 3.2.6.
- [Release notes](https://github.com/clap-rs/clap/releases)
- [Changelog](https://github.com/clap-rs/clap/blob/master/CHANGELOG.md)
- [Commits](clap-rs/clap@v3.2.4...v3.2.6)

---
updated-dependencies:
- dependency-name: clap
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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