test: Rebalance integration test groups to reduce G05 runtime

[tenfyzhong]

Description

The integration test grouping is currently imbalanced, and group G05 consistently takes much longer than other groups.
This causes uneven CI execution time and reduces overall pipeline efficiency.

Context

We should rebalance integration test cases across groups so the workload is distributed more evenly and G05 is no longer a bottleneck.

Proposed Solution

• Re-distribute integration test cases among existing groups.
• Keep each group’s runtime within a closer range.
• Re-validate CI runtime after regrouping and adjust if needed.

Additional Information

• Scope: integration test group balancing only.
• Primary goal: avoid G05 being significantly longer than other groups.