function mockHeavyAd(details) {
  return {
    code: 'HeavyAdIssue',
    details: {
      heavyAdIssueDetails: {
        resolution: 'HeavyAdBlocked',
        reason: 'CpuPeakLimit',
        frame: {
          frameId: 'frameId',
        },
        ...details,
      },
    },
  };
}
@param {Partial<LH.Crdp.Audits.HeavyAdIssueDetails>=} details
@return {LH.Crdp.Audits.InspectorIssue} partial