refactor(query): refactor runtime part 4

[zhang2014]

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Summary

refactor(query): refactor runtime

extract stat buffer
extract mem stat
add more unit test

• Fixes #[Link the issue here]

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):

---

This change is 

[github-actions]

Docker Image for PR

• tag: pr-14728-d7c0c62

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[github-actions]

Docker Image for PR

• tag: pr-14728-2868479

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Docker Image for PR

• tag: pr-14728-7f7ca88

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[github-actions]

ClickBench Report

• hits: https://benchmark.databend.rs/clickbench/pr/14728/8044114546/hits.html
• internal: https://benchmark.databend.rs/clickbench/pr/14728/8044114546/internal.html
• tpch: https://benchmark.databend.rs/clickbench/pr/14728/8044114546/tpch.html

[github-actions]

ClickBench Report

• hits: https://benchmark.databend.rs/clickbench/pr/14728/8044164799/hits.html
• internal: https://benchmark.databend.rs/clickbench/pr/14728/8044164799/internal.html
• tpch: https://benchmark.databend.rs/clickbench/pr/14728/8044164799/tpch.html

[github-actions]

ClickBench Report

• hits: https://benchmark.databend.rs/clickbench/pr/14728/8044225134/hits.html
• internal: https://benchmark.databend.rs/clickbench/pr/14728/8044225134/internal.html
• tpch: https://benchmark.databend.rs/clickbench/pr/14728/8044225134/tpch.html

[BohuTANG]

Not sure this is a degradation or not?

[zhang2014]

Not sure this is a degradation or not?

no cluster related modifications, let's run it again.

[github-actions]

Docker Image for PR

• tag: pr-14728-1dc2207

note: this image tag is only available for internal use,
please check the internal doc for more details.

[github-actions]

Docker Image for PR

• tag: pr-14728-4756d98

note: this image tag is only available for internal use,
please check the internal doc for more details.

[github-actions]

ClickBench Report

• hits: https://benchmark.databend.rs/clickbench/pr/14728/8044593457/hits.html
• internal: https://benchmark.databend.rs/clickbench/pr/14728/8044593457/internal.html
• tpch: https://benchmark.databend.rs/clickbench/pr/14728/8044593457/tpch.html

[github-actions]

ClickBench Report

• hits: https://benchmark.databend.rs/clickbench/pr/14728/8044589129/hits.html
• internal: https://benchmark.databend.rs/clickbench/pr/14728/8044589129/internal.html
• tpch: https://benchmark.databend.rs/clickbench/pr/14728/8044589129/tpch.html