Proposal to Reduce Disk Usage by Removing Unnecessary Witness Data

[eval-exec]

Feature Request

Is your feature request related to a problem? Please describe.

As CKB nodes continue to grow with more blocks, the data directory's disk space usage increases significantly. A large portion of the space is occupied by the witness field in the transaction structure. It would be helpful to provide a method to remove unnecessary witness data to save disk space.

Describe the solution you'd like

Provide a way to delete unnecessary witness field in ckb-freezer.

Describe alternatives you've considered

[github-actions]

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