When Subnet spec.vpc is updated, the status in VPC should also be updated

[oilbeater]

• Make sure you have followed Kube-OVN Code Style.

What type of this PR

Examples of user facing changes:

• Bug fixes

There is still issues when change the vpc field, related lrp will not be deleted.

Which issue(s) this PR fixes:

Fixes #1190

WHAT

🤖 Generated by Copilot at 0426884

This pull request enhances the VPC and subnet controller logic and fixes some minor issues in the code and comments of vpc.go. It improves the handling of subnet VPC changes and the ecmp based bfd feature.

🤖 Generated by Copilot at 0426884

Sing, O Muse, of the skillful code review
That fixed the errors and improved the features
Of the subnet controller, the wise and true
Guardian of the VPC, the cloud's great teacher.

HOW

🤖 Generated by Copilot at 0426884

• Add logic to handle subnet VPC changes (link, link)
• Fix typos and improve naming in pkg/controller/vpc.go (link, link, link, link)

[github-actions]

• In subnet.go, the function enqueueUpdateSubnet has been updated to add a check for changes in VPC. However, this check is also present in line 104. It would be better to remove the duplicate code and keep only one instance of the check.
• In vpc.go, the function handleAddOrUpdateVpc has a typo in the log message on line 405. "connecte" should be "connect".
• In vpc.go, the function handleAddOrUpdateVpc has another typo in the log message on line 452. "connecte" should be "connect".
• In vpc.go, the function handleAddOrUpdateVpc has a typo in the log message on line 458. "connecte" should be "connect".
• In vpc.go, the function handleAddOrUpdateVpc has a typo in the log message on line 407. "extrenalID" should be "externalID".