[Enhancement] (nereids)implement DropStoragePolicyCommand in nereids

[LiBinfeng-01]

Search before asking

• [X] I had searched in the issues and found no similar issues.

Description

DropStoragePolicyCommand is supported in the legacy planner but needs implementation in Nereids. Use the syntax definition in DorisParser.g4, and refer to DropPolicyStmt.java in the legacy planner.

unsupportedDropStatement : DROP STORAGE POLICY (IF EXISTS)? name=identifier

Solution

No response

Are you willing to submit PR?

• [ ] Yes I am willing to submit a PR!

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[msridhar78]

@LiBinfeng-01 @starocean999 I will pick this up, thanks