Introduce option to use the system cert store for TLS authentication.

[janosmurai]

Type Of Change

• [x] New feature (non-breaking change which adds functionality)
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Any modification in the test cases
• [x] Any modification in the documentation

Checklist:

• [x] I have read and followed the contribution guideline.
• [x] I have checked to ensure there aren't other open Pull Requests for the same update/change.
• [x] I have made corresponding changes to the documentation.

Related Issue

Closing: DEM-309

Description

DEM always used the default cacert.pem file for authentication provided by the certifi module. Introducing a new config option to make DEM use the operating system's certificate store.

Enhancing configuration management by adding default options and loading logic for registries, catalogs, hosts, certs and timeout settings. Introducing platform configuration method and updating documentation and test cases.

How Has This Been Tested?

Tested on Ubuntu 22.04, by both using the system and the certifi certifications.