feat: Add client for SystemLink results API

[Madhan-Reddy-ni]

• This contribution adheres to CONTRIBUTING.md.

TODO: Check the above box with an 'x' indicating you've read and followed CONTRIBUTING.md.

What does this Pull Request accomplish?

This PR adds client methods for all of the nitestmonitor result endpoints as well as testing for these endpoints.

Why should this Pull Request be merged?

This is an enhancement to the existing test monitor client and will enable users to more easily interact with SystemLink test results.

What testing has been done?

Auto testing is included against NI's test tier.

API Swagger Link - Results

[santhoshramaraj]

@SSSantosh18 @priyadarshini-ni @rbell517, when creating the ProductsClient, it was agreed that it is better to avoid the TestMonitorClient concept, as it may not be intuitive to users, as they don't see the TestMonitor anywhere on the SLE webpage. It is better to use separate clients for Products, Results, and Steps for the user to relate to the different pages or hierarchy.

FYI - @adamarnesen

[priyadarshini-ni]

@SSSantosh18 @priyadarshini-ni @rbell517, when creating the ProductsClient, it was agreed that it is better to avoid the TestMonitorClient concept, as it may not be intuitive to users, as they don't see the TestMonitor anywhere on the SLE webpage. It is better to use separate clients for Products, Results, and Steps for the user to relate to the different pages or hierarchy.

FYI - @adamarnesen
Related comment - #82 (comment). Confirmation on this would be helpful to proceed further.

The comments provided have been addressed and also aligned with the reviewer