owner: Fix owner exit due to emit checkpoint failure (#1985)

[ti-chi-bot]

This is an automated cherry-pick of #1985

What problem does this PR solve?

#1902

What is changed and how it works?

• do not return error if send checkpoint message to sink failed, stop the change feed that cause the error instead.
• fix some typo during walking the code.

Check List

Tests

• No code

Code changes

Side effects

Related changes

Release note

No release note

[ti-chi-bot]

@ti-chi-bot: This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick, it must first be approved by the collaborators.

AFTER it has been approved by collaborators, please ping the release team in a comment to request a cherry pick review.

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[3AceShowHand]

/run-all-tests

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• overvenus

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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[3AceShowHand]

/run-all-tests

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (release-5.0@fc4adf4). Click here to learn what that means.
The diff coverage is n/a.

@@               Coverage Diff                @@
##             release-5.0      #2031   +/-   ##
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  Coverage               ?   54.7511%           
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  Files                  ?        156           
  Lines                  ?      16796           
  Branches               ?          0           
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  Hits                   ?       9196           
  Misses                 ?       6615           
  Partials               ?        985           

[3AceShowHand]

/run-all-tests