replace lb function call with ovnClient

[gugulee]

• Make sure you have followed Kube-OVN Code Style.

What type of this PR

Examples of user facing changes:

• Features
• Bug fixes
• Docs
• Tests

Which issue(s) this PR fixes:

#2453

[github-actions]

• The commit message should be more descriptive and informative. It should clearly state what changes were made and why.
• There are no potential bugs or format errors in the diff.
• It is difficult to assess performance issues without more context about the code being changed.
• It would be helpful to include comments in the code explaining the purpose of each change and any potential edge cases that were considered.
• Consider adding unit tests to ensure that the changes do not introduce new bugs or regressions.
• It may be beneficial to refactor some of the code for readability and maintainability.

[github-actions]

• The commit message should be more descriptive and informative. It should clearly state what changes were made and why.
• There are no potential bugs or format errors in the diff.
• It is difficult to assess performance issues without more context about the code being changed.
• It would be helpful to include comments in the code explaining the purpose of each change and how it improves the code.
• It would be beneficial to include unit tests to ensure that the changes do not introduce new bugs or regressions.

[github-actions]

• The commit message should be more descriptive and informative. It should clearly state what changes were made and why.
• There are no potential bugs or format errors in the patch diff.
• It is difficult to assess performance issues without further context on the codebase and the changes made.
• Ways to improve could include adding comments to explain complex logic, refactoring repetitive code, and adhering to consistent coding style guidelines.