update aws-crt-cpp to v0.31.0

What's Changed

• Fix shadow samples in CI by @sfod in #780
• Disable Greengrass tests by @sfod in #770
• Add sanitizer CI job by @sfod in #703
• Fix arm based ci by @DmitriyMusatkin in #784
• Fix unused parameter in SecureTunnel by @sbSteveK in #783
• Update aws-crt-cpp to v0.31.0 by @xiazhvera in #785
• AutoTag PR for v1.35.1 by @bretambrose in #786

New Contributors

• @DmitriyMusatkin made their first contribution in #784

Full Changelog: v1.35.0...v1.35.1