refactor(main): remove release 4.x

[cuisongliu]

🤖 Generated by Copilot at 7e712d1

Summary

📦🔧📝

This pull request updates the release workflow and adds a custom configuration file for GoReleaser. The main goal is to support building and releasing the image-cri-shim binary, which is a new feature of the project. The release workflow is also simplified and improved to avoid unnecessary steps and conflicts.

image-cri-shim
New feature for sealos project
Autumn release soon

Walkthrough

• Add support for building and releasing image-cri-shim binary (link, link)
• Simplify the release workflow by removing unnecessary steps (link)

[sealos-ci-robot]

🤖 Generated by lychee action

Summary

Status	Count
🔍 Total	956
✅ Successful	375
⏳ Timeouts	0
🔀 Redirected	0
👻 Excluded	580
❓ Unknown	0
🚫 Errors	0

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Full Github Actions output

[cuisongliu]

Close #4172

[sweep-ai]

Apply Sweep Rules to your PR?

• Apply: Leftover TODOs in the code should be handled.
• Apply: All new business logic should have corresponding unit tests in the tests/ directory.
• Apply: Any clearly inefficient or repeated code should be optimized or refactored.

[sealos-ci-robot]

Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

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Close #4172

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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