AliCloud(Perf): Optimize AliCloudProvider NodeGroupForNode Function

[guopeng0]

What type of PR is this?

/kind feature

What this PR does / why we need it:

if a large number of nodes are created via instances not in Managed ASGs, every call to NodeGroupForNode->GetAsgForInstance->FindForInstance will trigger a regenerateCache. If there are a significant number of instances in Managed ASGs at that time, this could lead to frequent calls, each with a considerable time overhead for regenerateCache.

For example, if there are 1000 machines in Managed ASGs and suddenly 2000 instances not in Managed ASGs are added:

UpdateNodes->updateReadinessStats->NodeGroupForNode
This call is executed with every runOnce, and each node invokes NodeGroupForNode once. The 2000 newly added instances not in Managed ASGs will trigger regenerateCache, but it will only count instances in Managed ASGs. However, it will still execute 2000 times.

Assuming each regenerateCache call takes 10 seconds, this function will take:

2000 instances * 10 seconds/instance = 20000 seconds.
This significantly extends the duration of a single runOnce operation. During this period, if new pending pods appear, the Cluster Autoscaler might not function as expected, posing a severe risk.

Proposed Solution:

The regenerateCache operation will be moved to func (ali *aliCloudProvider) Refresh() error, which will be called on every runOnce. To reduce the frequency of calls, a minimum interval between calls will be introduced. Additionally, the caching mechanism for instancesNotInManagedAsg will be removed. Instances not in instanceToAsg will return nil. By refreshing regenerateCache on every runOnce, the correct results will eventually be obtained. This modification ensures that the normal operation of the Cluster Autoscaler (CA) is not affected by the appearance of a large number of instances not in Managed ASGs.
This approach is inspired by the latest implementation in the AWS CloudProvider 867

Which issue(s) this PR fixes:

Fixes #6748

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

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This pull-request has been approved by: guopeng0
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