chore: remove redundant experimental procedure toggles

[BohuTANG]

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Summary

Remove redundant set global enable_experimental_procedure=1; statements in procedure-related tests now that the flag defaults to enabled.

Fixes: N/A

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why (non-functional cleanup; relies on existing default setting)

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): Test cleanup to align with default setting

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This change is 

[github-actions]

🤖 CI Job Analysis

Workflow: 18677810657

📊 Summary

• Total Jobs: 83
• Failed Jobs: 2
• Retryable: 0
• Code Issues: 2

❌ NO RETRY NEEDED

All failures appear to be code/test issues requiring manual fixes.

🔍 Job Details

• ❌ linux / sqllogic / cluster (base, 2c8g, 2, hybrid): Not retryable (Code/Test)
• ❌ linux / sqllogic / standalone (base, 2c8g, hybrid): Not retryable (Code/Test)

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🤖 About

Automated analysis using job annotations to distinguish infrastructure issues (auto-retried) from code/test issues (manual fixes needed).