CI IntegrationTests failed on macOS 10.15 as Github Actions stop support

[josephca]

Which area/kind this issue is related to?

/area integration-tests

Issue Description

CI IntegrationTests failed on macOS 10.15 as Github Actions stop supporting it.

For more detail:
GitHub Actions : The macOS 10.15 Actions runner image is being deprecated and will be removed by 8/30/22.

https://github.blog/changelog/2022-07-20-github-actions-the-macos-10-15-actions-runner-image-is-being-deprecated-and-will-be-removed-by-8-30-22/