[Enhancement] (nereids)implement showReplicaDistributionCommand in nereids

[Vallishp]

What problem does this PR solve?

Issue Number: close #42782
#42837

Related PR: #xxx

Problem Summary:
implement showReplicaDistributionCommand in nereids

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

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1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
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[starocean999]

You can use PartitionNamesInfo.java from https://github.com/apache/doris/pull/44058/files . This pr has some extra work to do and will not be merged in a short time. So you can add PartitionNamesInfo.java in your pr.

[Vallishp]

run buildall

[starocean999]

please help update the two functions in Command.java (add ConnectContext as param)

public void verifyCommandSupported(ConnectContext ctx) throws DdlException {
    // check command has been supported in cloud mode
    if (Config.isCloudMode()) {
        checkSupportedInCloudMode(ctx);
    }
}

protected void checkSupportedInCloudMode(ConnectContext ctx) throws DdlException {}

and then change the caller in StmtExecutor.java
((Command) logicalPlan).verifyCommandSupported(context);

at last, override checkSupportedInCloudMode method as bellow

protected void checkSupportedInCloudMode(ConnectContext ctx) throws DdlException {
    if (!ctx.getCurrentUserIdentity().getUser().equals(Auth.ROOT_USER)) {
        LOG.info("stmt={}, not supported in cloud mode", stmt.toString());
        throw new AnalysisException("Unsupported operation");
    }
}

[Vallishp]

run buildall

[Vallishp]

run buildall

[Vallishp]

run buildall

[Vallishp]

run buildall

[Vallishp]

run buildall

[Vallishp]

run buildall

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.