[FE]: Auto-add Result to many TestCases

[AdamPiotrowski91]

Description: (details of what and how should work) Option to add a Result of TestCase to multiple TestCases at once. Currently workflow for Result creation requires you to create a Result to each TestCase individually - this would enhance it to create a Result once and add it to many TCs at once.

Additional Context & Ad Hoc Info: (Add any other context about the problem here.) Details with my favourite QE 😛 List of TestCases to add the Result to is 1:1 with TestSet: aka "add to all TCs under a specific TS"

[AdamPiotrowski91]

Actions:

• [x] Add support for TestCaseResult object in rally-api
• [x] SPIKE API behaviour for adding result via standard workflow and what is and isn't available + whether Collections API works
• [x] Implement entrypoint with dry-run behaviour
• [x] Implement functionality fully