add e2e for new ippool feature

[zhangzujian]

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

What type of this PR

• Tests

Which issue(s) this PR fixes:

Fixes #(issue-number)

WHAT

🤖 Generated by Copilot at fc7d4ed

This pull request adds and updates the test packages and methods for the IPPool and namespace annotation features in the kube-ovn project. It also enhances the framework package with new packages, methods, and error handling. Additionally, it renames some PatchPod methods to Patch for consistency. The affected files are test/e2e/framework/deployment.go, test/e2e/framework/util.go, test/e2e/kube-ovn/ipam/ipam.go, pkg/internal/big_int.go, test/e2e/framework/ippool.go, test/e2e/framework/namespace.go, test/e2e/framework/pod.go, and test/e2e/kube-ovn/qos/qos.go.

🤖 Generated by Copilot at fc7d4ed

The pull request has many changes
To test the IPPool and its ranges
It adds new methods and files
To the framework and its styles
And patches the pods with some patches

HOW

🤖 Generated by Copilot at fc7d4ed

• Add methods to create, update, patch, delete, and validate IPPools in the framework package (link)
• Add methods to get, create, patch, and delete namespaces in the framework package (link)
• Add methods to patch and wait for deployment rollout in the framework package (link, link)
• Add method to check if BigInt is equal to int64 in the internal package (link)
• Rename PatchPod method to Patch in the framework and qos packages (link, link)
• Use strset package to generate and manipulate random IPs in the framework package (link, link)
• Use ipam package to define and manipulate IP and IPRange objects in the ipam package (link)
• Add test case to verify IPPool feature in the ipam package (link)
• Add and modify imports and variables in the framework, ipam, and qos packages (link, link, link, link, link, link)
• Add step to delete ippool in the ipam package (link)
• Use sort package to sort IPs by numerical order in the ipam package (link)