Fix context usage in E2E

[ramizpolic]

          Okay so, we have a problem with passing contexts to these functions from the parent.

The issue why we can't use the ctx variable here from the afterSetup function's parameter is because if you follow up the call chain then that ctx is the setupCtx variable in the beforeSuit function, see here: https://github.com/openclarity/vmclarity/blob/main/e2e/suite_test.go#L68

That context ends when the beforeSuit function runs to completion and after that the context is not available, but with the current solution we want to use that context in actual tests (because we want to have an open SSH connection to VMClarity control plane while the tests are running).

This is not going to work, we have to rework how we pass context from ginkgo's test suite creation to the actual test environments, but I think that's out of the scope of this PR.

The situation is the same here in your previous comment - https://github.com/openclarity/vmclarity/pull/1601/files/de050880ac466a03a92bbf25a6497d4bde060beb#diff-7be911ff144b8813d4374c3f85695689dd505e9ace576d90e7f0f2b7a071b421R327 - the context that we pass to the iamService is cancelled when the beforeSuit ends, but we want to use this context in the TearDown where we want to undelete the 2 roles.

Originally posted by @adamtagscherer in openclarity/vmclarity#1601 (comment)

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