Adapt to the new fields of tiflash system table

[JaySon-Huang]

Enhancement

TiFlash issue: pingcap/tiflash#10272
TiFlash PR: pingcap/tiflash#10275

In order to improve the observability for TiFlash OOM risk under wide-column scenario, tiflash added delta_cache_alloc_size to system.dt_segments and column_count,delta_cache_alloc_size to system.dt_tables.

For the tidb side, it should add related columns to the information_schema.tiflash_tables and information_schema.tiflash_segments for retrieving the result from tiflash instances.

[JaySon-Huang]

/label component/tiflash

[ti-chi-bot]

@JaySon-Huang: The label(s) component/tiflash cannot be applied. These labels are supported: fuzz/sqlancer, fuzz/comp, challenge-program, compatibility-breaker, first-time-contributor, contribution, good first issue, correctness, duplicate, proposal, security, needs-more-info, needs-cherry-pick-release-6.5, needs-cherry-pick-release-7.1, needs-cherry-pick-release-7.5, needs-cherry-pick-release-8.1, needs-cherry-pick-release-8.5, needs-cherry-pick-release-9.0-beta.2, affects-6.5, affects-7.1, affects-7.5, affects-8.1, affects-8.5, affects-9.0, may-affects-6.5, may-affects-7.1, may-affects-7.5, may-affects-8.1, may-affects-8.5.

In response to this:

/label component/tiflash

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[JaySon-Huang]

/label tiflash

[ti-chi-bot]

@JaySon-Huang: The label(s) tiflash cannot be applied. These labels are supported: fuzz/sqlancer, fuzz/comp, challenge-program, compatibility-breaker, first-time-contributor, contribution, good first issue, correctness, duplicate, proposal, security, needs-more-info, needs-cherry-pick-release-6.5, needs-cherry-pick-release-7.1, needs-cherry-pick-release-7.5, needs-cherry-pick-release-8.1, needs-cherry-pick-release-8.5, needs-cherry-pick-release-9.0-beta.2, affects-6.5, affects-7.1, affects-7.5, affects-8.1, affects-8.5, affects-9.0, may-affects-6.5, may-affects-7.1, may-affects-7.5, may-affects-8.1, may-affects-8.5.

In response to this:

/label tiflash

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[JaySon-Huang]

/label affects-8.5

[JaySon-Huang]

/label affects-8.1

[JaySon-Huang]

/label affects-7.5

[JaySon-Huang]

/component tiflash