Add WithContext to the Client

[falfaroc]

Description

Add the ability to chain WithContext to Client api calls. This allows us to pass through the parent context that will be used to satisfy the timeouts of each http call.

Note: The context is not forced to be passed through on every call to limit the API changes throughout. It is up to the user to chain the context whenever it is needed.

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#1559

Checklist:

• I have performed a self-review of my own code to ensure there are no formatting, vetting, linting, or security issues
• I have verified that new and existing unit tests pass locally with my changes
• I have not allowed coverage numbers to degenerate
• I have maintained at least 80% code coverage
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• Backward compatibility is not broken

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

• Add unit tests with chaining the context and ensuring that we do not hit a context deadline in subsequent calls.
• Adopted, where needed, the WithContext chaining in the PowerFlex driver where we were seeing a context deadline.