[Improvement] Introduce the local_storage_is_writable metric

[zuston]

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• I have searched in the issues and found no similar issues.

What would you like to be improved?

Introduce the local_storage_is_writable metric to indicate the local file is writable clearly.

How should we improve?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

[rickyma]

Is is_writable here means !corrupted?

[zuston]

Is is_writable here means !corrupted?

I think it takes the meanings with space enough + not corrupted. And this metric is construct by the local storage canWrite method, that means it will be more precise.

[zuston]

solved by #1682