[feature]: replication policy update from file

## Problem
Harbor replication policies can created from yaml or json input. They cannot be updated from file. This has to be implemented.

## Proposed Solution
Add a flag that specifies the input file for the update. Should be similar as in `examples/config/replication-policies/manual.json` or similar example files.

## Alternatives Considered
Not needed

## Additional Context

Start by locating the replication-policy update command and its existing file-based creation path. Compare the expected input with examples/config/replication-policies/manual.json and similar example files. Done means the update command accepts a YAML or JSON input-file flag and applies the policy data consistently with creation.

Written by the indexing model from the issue text.