Merge branch 'jivanvl-change-job-log-getter-header-time' into 'master'

Revert headerTime nullish coalescing

See merge request gitlab-org/gitlab!54956

app/assets/javascripts/jobs/store/getters.js

 import { isEmpty, isString } from 'lodash';
 import { isScrolledToBottom } from '~/lib/utils/scroll_utils';
 
-export const headerTime = (state) => state.job.started ?? state.job.created_at;
+export const headerTime = (state) => (state.job.started ? state.job.started : state.job.created_at);
 
 export const hasForwardDeploymentFailure = (state) =>
   state?.job?.failure_reason === 'forward_deployment_failure';