mgr/dashboard: Controls UI inputs based on "type"

mgr/dashboard: Controls UI inputs based on "type"

iSCSI controls UI inputs should be rendered based
on the control "type" returned by `ceph-iscsi`.

Fixes: https://tracker.ceph.com/issues/41682
Signed-off-by: Ricardo Marques <rimarques@suse.com>
(cherry picked from commit f61cb6fc635fa689dda447d77d57e27f99bc0fbc)

 Conflicts:
	src/pybind/mgr/dashboard/frontend/src/app/ceph/block/iscsi-target-image-settings-modal/iscsi-target-image-settings-modal.component.html
	src/pybind/mgr/dashboard/frontend/src/app/ceph/block/iscsi-target-iqn-settings-modal/iscsi-target-iqn-settings-modal.component.html
        src/pybind/mgr/dashboard/frontend/src/app/ceph/block/iscsi-setting/iscsi-setting.component.html

Conflicts caused by "Master" using Bootstrap 4, but "Nautilus" using Bootstap 3.