🐛 fix env merge for sealos run

[cuisongliu]

🤖 Generated by Copilot at 7fe5f62

Summary

🔧🌐🖼️

Refactored the clusterfile and guest packages to use interfaces and variable merging for environment variables. This improves the code quality and flexibility for managing cluster nodes and images.

We're refactoring the code, me hearties, yo ho ho
We're making it more flexible and testable, don't you know
We're renaming and merging env vars for the image commands
We're heaving on the clusterfile package on the count of three

Walkthrough

• Refactor Process function in pkg/clusterfile/pre_process.go to use EnvGetter interface instead of setting environment variables directly (link, link)
• Change NewGuestManager function in pkg/guest/guest.go to accept an EnvGetter parameter instead of a map of environment variables (link)
• Use maps.MergeMap function to merge image-specific and cluster-wide environment variables in pkg/guest/guest.go before executing image commands (link, link)

[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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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