fix(marker): extend marker support to dynamips and cloud nodes

Dynamips needed its own NIO base class extended with a `_markers`
attribute and `markers` property (mirroring the existing `filters`
pattern), plus marker propagation from the controller-supplied NIO
settings through NIOUDP.create/update to the common destination
NIO that base_node._ubridge_apply_markers reads.

Cloud simply needed the missing _ubridge_apply_markers calls after
_ubridge_apply_filters in its two ubridge connection methods, same
pattern as the earlier docker fix.

Both types are now added back to _MARKER_CAPABLE_TYPES.

gns3server/controller/udp_link.py

@@ -26,7 +26,7 @@ from gns3server.utils.packet_filter_validation import validate_bpf_syntax, Filte
 # `mark` filter to).  Mirrors _get_filter_node in link.py, minus "nat"
 # (which has no uBridge).
 _MARKER_CAPABLE_TYPES = frozenset({
-    "vpcs", "qemu", "docker", "iou",
+    "vpcs", "qemu", "docker", "iou", "dynamips", "cloud",
 })