Investigate/fix test_cancel_running_job() in test_job.py

[robotAstray]

Summary

This PR addresses the issue described in Issue #1019,

Changes Made

- Modified the cancel method in runtime_job.py to handle status codes 409 and 204 as cases where job cancellation cannot be performed due to specific conditions. This ensures that the client-side status accurately reflects the server-side status.

• Updated the test_cancel_job_running function to wait for the server-side status update after cancellation before performing assertions. This change ensures that the test accurately reflects the behaviour of cancelling a running job.

Fixes:

• |
  Fixes a race condition in the function test_cancel_running_job() in test_job()where job cancellation
  cannot be performed due to specific conditions. Refer to Investigate/fix test_cancel_running_job #1019 for more details.

[CLAassistant]

All committers have signed the CLA.

[robotAstray]

@kt474 I will fix the release notes as well

[coveralls]

Pull Request Test Coverage Report for Build 5918090939

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 74.058%

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Totals
Change from base Build 5906160217:	0.0%
Covered Lines:	2458
Relevant Lines:	3319

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💛 - Coveralls

[kt474]

Thanks for taking care of this @robotAstray! I think there is still an issue with the cancel() method itself but that can be taken care of in a separate PR

#1038