[bug-985]: Update flag descriptions and move flags to relevant commands

[atye]

Description

• Defines the admin-token, addr, and insecure flags only on the relevant commands (karavictl generate, storage, role, rolebinding, tenant) to accurately reflect usage
• Updates admin-token and addr as required flags for relevant commands so if the user doesn't provide them, the output is clear about it
• Removes unused functionality that was put in place by Cobra by default

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#895

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 90% 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

Existing unit tests updated.

[xuluna]

Out of curiosity, why did we do a NewRootCmd() here instead of NewRoleCreateCmd()? Then we don't need to add the role, create, into the Args?

[atye]

Not entirely sure. The other tests have this pattern and I followed it because it doesn't seem bad.

[atye]

run e2e test