fix permission for cleanupSubscription on OLM installation

[freeznet]

Motivation

W1024 08:06:04.290819       1 reflector.go:424] pkg/mod/k8s.io/client-go@v0.25.0/tools/cache/reflector.go:169: failed to list *v1.Pod: pods is forbidden: User "system:serviceaccount:sn-system:function-mesh-controller-manager" cannot list resource "pods" in API group "" at the cluster scope

Failed to cleanupSubscription on OLM installation.

Modifications

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Verifying this change

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This change is a trivial rework / code cleanup without any test coverage.

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This change is already covered by existing tests, such as (please describe tests).

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This change added tests and can be verified as follows:

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• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Documentation

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[github-actions[bot]]

@freeznet:Thanks for your contribution. For this PR, do we need to update docs? (The PR template contains info about doc, which helps others know more about the changes. Can you provide doc-related info in this and future PR descriptions? Thanks)

[github-actions[bot]]

@freeznet:Thanks for providing doc info!

[freeznet]

@jiangpengcheng please help to verify if https://github.com/streamnative/function-mesh/pull/704/commits/5f675736a3105e6792d4b2bdb9ce0dfc3594d099 is needed.

[jiangpengcheng]

@jiangpengcheng please help to verify if 5f67573 is needed.

It's better to have it

Then we need to add such logic to controllers/sink.go#ApplySinkCleanUpJob and cotrollers/source.go#ApplySourceCleanUpJob too