infoschema: remove some redundant methods from InfoSchema

[tiancaiamao]

What problem does this PR solve?

Issue Number: ref #50959

Problem Summary:

What changed and how does it work?

We're going to implement the InfoSchemaV2, the new implementation need to keep almost the same interface.
So, remove the redundant methods can make the refactor easier.

AllSchemaNames() []string
TableIsView(schema, table model.CIStr) bool
TableIsSequence(schema, table model.CIStr) bool

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Just tiny refactor, no functional changes.

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

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @tiancaiamao. Thanks for your PR.

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[codecov]

Codecov Report

Merging #50916 (3c452f8) into master (c76fe3f) will increase coverage by 2.1981%.
Report is 23 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #50916        +/-   ##
================================================
+ Coverage   70.5619%   72.7600%   +2.1980%     
================================================
  Files          1466       1467         +1     
  Lines        433823     437255      +3432     
================================================
+ Hits         306114     318147     +12033     
+ Misses       108537      99041      -9496     
- Partials      19172      20067       +895     

Flag	Coverage Δ
integration	48.9676% <68.7500%> (?)
unit	70.2579% <93.7500%> (-0.1256%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	54.2940% <ø> (ø)
parser	∅ <ø> (∅)
br	51.2032% <ø> (+5.4283%)	⬆️

[tiancaiamao]

/test pull-integration-ddl-test

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[tiancaiamao]

PTAL @GMHDBJD

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AilinKid, zimulala

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Needs approval from an approver in each of these files:

• OWNERS [AilinKid,zimulala]
• pkg/ddl/OWNERS [zimulala]
• pkg/domain/OWNERS [zimulala]
• pkg/infoschema/OWNERS [zimulala]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-02-02 07:20:53.098308921 +0000 UTC m=+1722894.662606611: ☑️ agreed by zimulala.
• 2024-02-03 14:37:13.03621394 +0000 UTC m=+21958.602983833: ☑️ agreed by AilinKid.