drainer: support load table infos to save memory and add gc safepoint update (#1233)

[ti-chi-bot]

This is an automated cherry-pick of #1233

What problem does this PR solve?

Issue Number: ref #1137

What is changed and how it works?

1. support load table infos from tidb
2. add gc safepoint ttl update to avoid table info is gced

Check List

Tests

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

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation
• Need to update the tidb-ansible repository
• Need to be included in the release note

Release note

None

[lichunzhu]

/retest

[lichunzhu]

/run-unit-test

[Benjamin2037]

LGTM

[ti-chi-bot]

@Benjamin2037: adding LGTM is restricted to approvers and reviewers in OWNERS files.

In response to this:

LGTM

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[lance6716]

/lgtm

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Benjamin2037, lance6716, lichunzhu

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Needs approval from an approver in each of these files:

• OWNERS [lance6716,lichunzhu]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-16 06:55:44.1037406 +0000 UTC m=+4318541.690850741: ☑️ agreed by lichunzhu.
• 2023-11-16 07:16:29.413522769 +0000 UTC m=+4319787.000632910: ☑️ agreed by lance6716.

[lichunzhu]

/cherry-pick release-6.1-20231116-v6.1.7

[ti-chi-bot]

@lichunzhu: new pull request created to branch release-6.1-20231116-v6.1.7: #1272.

In response to this:

/cherry-pick release-6.1-20231116-v6.1.7

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