server, execute: set text for execute command (#41340)

[ti-chi-bot]

This is an automated cherry-pick of #41340

Signed-off-by: YangKeao yangkeao@chunibyo.icu

What problem does this PR solve?

Issue Number: close #41156

Problem Summary:

The text of the execute stmt constructed in the ExecuteCommand is not initialized. This PR initializes it to the prepared statement text. This behavior is consistent with the MySQL.

What is changed and how it works?

Initialize the text for ExecuteCommand.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Release note

Fix the issue that `execute` statement is not shown in the info of `show processlist`.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• XuHuaiyu
• hawkingrei

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[hawkingrei]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 6eb9a5e