Create a Ray Cluster SDK upgrade scenarios during OLM upgrade

[Srihari1192]

Issue link

#184

What changes have been made

• Added Ray Cluster SDK upgrade scenarios tests TestMNISTRayClusterUp and TestMnistJobSubmit in upgrade package to run the test before an operator upgrade and after upgrade
• Adjusted the workflows olm_tests.yaml to include Raycluster upgrade scenarios tests

Verification steps

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • Testing is not required for this change

[openshift-ci]

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[astefanutti]

/lgtm

[sutaakar]

@Srihari1192 Could you move this code into SDK repo? So that all SDK related tests are on one place.

[Srihari1192]

@Srihari1192 Could you move this code into SDK repo? So that all SDK related tests are on one place.

Sure will move this to sdk repo

[Srihari1192]

Closing this PR as moving these tests into codeflare-sdk project-codeflare/codeflare-sdk#440