processor(ticdc): remove table in source manager

[Rustin170506]

What problem does this PR solve?

Issue Number: ref #5928, close #7813

What is changed and how it works?

Remove table in source manager.

Check List

Tests

• Manual test (add detailed scripts or steps below)
• No code

Questions

Will it cause performance regression or break compatibility?

No

Do you need to update user documentation, design documentation or monitoring documentation?

No

Release note

None

[ti-chi-bot]

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[ti-chi-bot]

@hi-rustin: PR needs rebase.

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