fix(esp_clang): fixed the clang to be installed as part of offline installer

[alirana01]

Description

esp-clang made part of offline installer required for the Eclipse

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Checklist

Before submitting a Pull Request, please ensure the following:

• [x] 🚨 This PR does not introduce breaking changes.
• [x] All CI checks (GH Actions) pass.
• [x] Documentation is updated as needed.
• [x] Code is well-commented, especially in complex areas.
• [x] Git history is clean — commits are squashed to the minimum necessary.

[alirana01]

@igrr Can you please verify if the changes are correct for the esp-clang. I can then run the installer after merging it.