add stored proc statements to SQL Statements list

[taroface]

The stored procedure statements were missing from the SQL Statements page since they were introduced in 23.2.

[github-actions[bot]]

Files changed:

• src/current/v23.2/sql-statements.md
• src/current/v24.1/sql-statements.md
• src/current/v24.2/sql-statements.md
• src/current/v24.3/sql-statements.md

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