Set offset of the used-for-write element in case of I/O rule on 'current' StreamerInfo.
Set offset of the used-for-write element in case of I/O rule on 'current' StreamerInfo.

Also write element should never be cached and always use the current offset.

This fixes ROOT-10016

(redo)

root-mirror/root,karies/root,olifre/root,root-mirror/root,olifre/root,karies/root,olifre/root,karies/root,karies/root,root-mirror/root,olifre/root,olifre/root,olifre/root,karies/root,root-mirror/root,root-mirror/root,karies/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,karies/root,karies/root,karies/root,karies/root,olifre/root,root-mirror/root,karies/root,olifre/root,olifre/root