Update build-s3-dist.sh and run-unit-tests.sh to Handle Paths with Spaces

[adam-intel]

Description of changes:
This update enhances the build script to properly handle paths with spaces. The script now correctly handles directory names that contain spaces by wrapping variables in quotes when they are used in commands.

This change does not alter any functional aspects of the script other than improving its compatibility with directory names containing spaces.

Testing:
The script was tested in environments with and without spaces in directory paths to ensure that it functions correctly in both scenarios.

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[mikeols]

Thanks @adam-intel. These changes seem reasonable, but we will review. We cannot merge these PRs directly, but if this change is accepted, we can incorporate it into a future release.