[ews] Store ews logs for longer. Since we added GitHub PRs support in EWS, amount of logs have increased significantly and current log file store only a day or two worth of logs. That sometimes makes debugging any issue harder which happened few days back. We should store more logs.
<rdar://problem/104666225>
Pull request: https://github.com/WebKit/WebKit/pull/9151
Committed 259391@main (fe234e0287bf): <https://commits.webkit.org/259391@main> Reviewed commits have been landed. Closing PR #9151 and removing active labels.