Support listing the stored procedures of a graph

[zhanglei1949]

Currently the stored procedure list could be retrived by gsctl ls, we could extend gsctl ls <resource_type>?.

[github-actions[bot]]

/cc @zhanglei1949 @lidongze0629, this issus/pr has had no activity for for a long time, could you folks help to review the status ? To suppress further notifications,

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