Use the HTTP Last-Modified http header as the mtime value for ADD cmd when present
Use the HTTP Last-Modified http header as the mtime value for ADD cmd when present

Closes #8331

Signed-off-by: Doug Davis <ff3bde741799c0eff815b83a54eda3fc494df54f@us.ibm.com>

Zebrilee/cli,allencloud/cli,e11137/cli,allencloud/cli,e11137/cli,thaJeztah/cli,dnephin/cli,ashfall/cli,redpanda/cli,riyazdf/cli,docker/cli,riyazdf/cli,cpuguy83/cli,dnephin/cli,redpanda/cli,thaJeztah/cli,ashfall/cli,cpuguy83/cli,Zebrilee/cli,docker/cli