Use Reader.Get() to retrieve the resource outside of cache scope

[YCShen1010]

What this PR does:

This is an issue where resources outside the runtime cache scope caused errors during retrieval and deletion. Using Reader.Get() instead of Client.Get in deleteResource function to bypass the cache when necessary, ensuring reliable access to all resources.

Issue: https://github.ibm.com/IBMPrivateCloud/roadmap/issues/65386

How to test

Test image: quay.io/yuchen_shen/cs_operator:error_msg

1. Install v4 in single namespace
2. See the following error msg:

I1128 16:04:26.927875 1 init.go:960] MutatingWebhookConfiguration /ibm-common-service-webhook-configuration not found, skipping deletion
I1128 16:04:26.931228 1 init.go:960] MutatingWebhookConfiguration /ibm-operandrequest-webhook-configuration not found, skipping deletion
I1128 16:04:26.934923 1 init.go:960] ValidatingWebhookConfiguration /ibm-cs-ns-mapping-webhook-configuration not found, skipping deletion
I1128 16:04:26.939207 1 init.go:960] PodPreset error/ibm-common-service-webhook not found, skipping deletion
I1128 16:04:26.939241 1 init.go:960] ServiceAccount error/ibm-common-service-webhook not found, skipping deletion
I1128 16:04:26.939254 1 init.go:960] Role error/ibm-common-service-webhook not found, skipping deletion
I1128 16:04:26.939266 1 init.go:960] RoleBinding error/ibm-common-service-webhook not found, skipping deletion
E1128 16:04:26.939300 1 init.go:872] Error deleting webhook resources: unable to get: /ibm-common-service-webhook because of unknown namespace for the cache
I1128 16:04:26.939310 1 init.go:960] ServiceAccount error/secretshare not found, skipping deletion
E1128 16:04:26.939316 1 init.go:876] Error deleting secretshare resources: unable to get: /secretshare because of unknown namespace for the cache
I1128 16:04:26.939325 1 init.go:222] Checking if OperandRegistry and OperandConfig CRD already exist

3. Apply the test image, the error msg will be gone:

I1128 16:21:33.928733 1 init.go:841] Extracting Keycloak themes from jar file
I1128 16:21:33.953978 1 init.go:961] MutatingWebhookConfiguration /ibm-common-service-webhook-configuration not found, skipping deletion
I1128 16:21:33.956404 1 init.go:961] MutatingWebhookConfiguration /ibm-operandrequest-webhook-configuration not found, skipping deletion
I1128 16:21:33.959790 1 init.go:961] ValidatingWebhookConfiguration /ibm-cs-ns-mapping-webhook-configuration not found, skipping deletion
I1128 16:21:33.962589 1 init.go:961] PodPreset error/ibm-common-service-webhook not found, skipping deletion
I1128 16:21:33.964579 1 init.go:961] ServiceAccount error/ibm-common-service-webhook not found, skipping deletion
I1128 16:21:33.966986 1 init.go:961] Role error/ibm-common-service-webhook not found, skipping deletion
I1128 16:21:33.969962 1 init.go:961] RoleBinding error/ibm-common-service-webhook not found, skipping deletion
I1128 16:21:33.972802 1 init.go:961] ClusterRole /ibm-common-service-webhook not found, skipping deletion
I1128 16:21:33.976598 1 init.go:961] ClusterRoleBinding /ibm-common-service-webhook-error not found, skipping deletion
I1128 16:21:33.979181 1 init.go:961] Deployment error/ibm-common-service-webhook not found, skipping deletion
I1128 16:21:33.982111 1 init.go:961] ServiceAccount error/secretshare not found, skipping deletion
I1128 16:21:33.984900 1 init.go:961] ClusterRole /secretshare not found, skipping deletion
I1128 16:21:33.987555 1 init.go:961] ClusterRoleBinding /secretshare-error not found, skipping deletion
I1128 16:21:33.990717 1 init.go:961] SecretShare Operator CR error/common-service not found, skipping deletion
I1128 16:21:33.993244 1 init.go:961] Deployment error/secretshare not found, skipping deletion
I1128 16:21:33.993263 1 init.go:222] Checking if OperandRegistry and OperandConfig CRD already exist

4. The warning msg that is showing the resources are not found, skipping deletion is also hidden, so the final log looks like

I1128 16:28:56.212313 1 init.go:841] Extracting Keycloak themes from jar file
I1128 16:28:56.297247 1 init.go:222] Checking if OperandRegistry and OperandConfig CRD already exist

[Daniel-Fan]

/lgtm

[ibm-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Daniel-Fan, YCShen1010

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