[EuiPageHeaderContent] Ensure restrictWidth applies to children only usage#8965

mgadewoll merged 5 commits intoelastic:mainelastic/eui:mainfrom

mgadewoll:pageheader/support-restrict-width-for-children-onlymgadewoll/eui:pageheader/support-restrict-width-for-children-onlyCopy head branch name to clipboard