Storages: enhance data sharing column cache

[Lloyd-Pottiger]

What problem does this PR solve?

Issue Number: close #6092

Problem Summary:

Using ColumnCache whose cache entry is a pack. ColumnSharingCache's cache entry is several packs.

What is changed and how it works?

Check List

Tests

• [ ] Unit test
• [ ] Integration test
• [ ] Manual test (add detailed scripts or steps below)
• [ ] No code

Side effects

• [ ] Performance regression: Consumes more CPU
• [ ] Performance regression: Consumes more Memory
• [ ] Breaking backward compatibility

Documentation

• [ ] Affects user behaviors
• [ ] Contains syntax changes
• [ ] Contains variable changes
• [ ] Contains experimental features
• [ ] Changes MySQL compatibility

Release note

None

[JaySon-Huang]

Remove the duplicate code of getting data type on disk in different places: https://github.com/Lloyd-Pottiger/tiflash/pull/19

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JaySon-Huang, JinheLin

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/pingcap/tiflash/blob/master/OWNERS)~~ [JaySon-Huang,JinheLin] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-11-26 10:11:21.686748028 +0000 UTC m=+544869.306402544: :ballot_box_with_check: agreed by JinheLin.
• 2024-11-27 09:39:23.789798066 +0000 UTC m=+629351.409452582: :ballot_box_with_check: agreed by JaySon-Huang.