Trigger pipeline for pre-main-jh

Related issue: https://jihulab.com/gitlab-cn/gitlab/-/issues/2715

What does this MR do and why?

Trigger pipeline for pre-main-jh branch.

Let it trigger pipeline same as main-jh default banch:

    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
      variables:
        <<: *default-ruby-variables
        <<: *default-branch-incident-variables
        PIPELINE_NAME: 'Ruby $RUBY_VERSION $CI_COMMIT_BRANCH branch pipeline'

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