Default to latest Holoscan SDK version (4.3.0)

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## Summary by CodeRabbit

* **Chores**
* Extended compatibility across applications, modules, and tutorials to
support Holoscan SDK version 4.3.0.
  * Updated default SDK version to 4.3.0 for templates and utilities.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: Jean-Christophe Fillion-Robin <jcfr@nvidia.com>