chore(e2e): add/move Github login specific test case to github Auth provider test suite.

[subhashkhileri]

Description

Add/Move Github login specific test case to github Auth provider test suite.

Which issue(s) does this PR fix

https://issues.redhat.com/browse/RHIDP-4992

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary (requirement for new features)
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@subhashkhileri: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-tests	e4509df	link	true	/test e2e-tests

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