feat: soft delete

[iamryanchia]

What type of PR is this?

/kind feature

What this PR does / why we need it:

In the current implementation, the lifecycle of storage data is bound to object in cluster. When an object is deleted in cluster, the associated data in storage will also be cleared.

Events in cluster are retained for one hour by default. As key information for troubleshooting, it is usually hoped that events can be retained for a longer time, which requires karpor to unbind the lifecycle of specific types of resources from cluster.

This PR adds a remainAfterDeleted field in the SyncRegistry CRD to control that a certain type of resources remain in storage after being deleted in cluster.

If the user sets remainAfterDeleted=true for a type of resource, the user needs to delete the associated data in the storage by himself. Karpor only marks deleted=true for storage data when the object is deleted in cluster.

For resources that leave remainAfterDeleted unset (remainAfterDeleted=false), the data in storage will be deleted immediately after the cluster object is deleted.

apiVersion: search.karpor.io/v1beta1
kind: SyncRegistry
metadata:
  name: events-sync-rule
spec:
  clusters:
    - "*"
  syncResources:
    - apiVersion: v1
      resource: events
      trimRefName: for-events
      remainAfterDeleted: true

Which issue(s) this PR fixes:

Fixes #