feat(query): better script engine with dynamic schema support

[sundy-li]

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Summary

This PR implements a better script engine with enhanced support for dynamic schema handling and improved AST parsing for stored procedures and script execution.

Key improvements:

• Dynamic Schema Support: Added dynamic schema handling for EXECUTE IMMEDIATE statements that can return different schemas based on runtime execution
• Enhanced AST Parsing: Refactored procedure-related AST structures to use Identifier instead of String for better type safety and script variable support
• Script Engine Improvements: Enhanced script compilation and execution with better variable resolution and return value handling
• CALL Statement Enhancements: Improved CALL statements to support identifier variables for dynamic procedure/task names
• Cursor syntax in procedure:

declare cursor from stmt

 LET c1 CURSOR FOR SELECT number + 10 FROM numbers(10);

declare cursor from resultset, open fetch and close

 LET S RESULTSET := (select number + 10 a, number + 20 b FROM numbers(10));
  LET c1 CURSOR FOR S;

 OPEN c1;
  FETCH c1 INTO var_for_column_value;

close c1;

iterator the cursor:

LET S RESULTSET := (select number + 10 a, number + 20 b FROM numbers(10));
  LET c1 CURSOR FOR S;
  LET sum := 0;
  for c in c1 do
    sum := sum + c.a + c.b;
  end for;

Major changes:

• Modified ExecuteImmediateStmt to accept expressions instead of plain strings
• Added ScriptBlockOrStmt enum to handle both script blocks and individual statements
• Updated task and procedure execution to use Identifier types for names
• Enhanced HTTP query execution to handle dynamic schemas
• Added comprehensive test coverage for script variable usage in procedure calls

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is 

[sundy-li]

@youngsofun for dynamic schema, please review this

[youngsofun]

lgtm