Add PodLog function to retrieve Pod log using function

[sutaakar]

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What changes have been made

Added PodLog function to be able to retrieve Pod log for gomega Eventually assertions.
Renamed GetPodLogs to GetPodLog to keep consistency, the previous function is not used anywhere.

Verification steps

N/A

Checks

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

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: astefanutti, sutaakar

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