[STAC-25235] Verify networkv2 (Go network check) system.net.* metric parity on STS

[kkaempf]

STAC-25235

(Sub-task of [Epic] [STAC-25220] Update main agent from 7.78.2 → 7.80.4 (upstream DataDog Agent 7.79.x + 7.80.x))

Context
DataDog 7.73.0 enabled the Go network core check (networkv2) by default (Linux/Windows); 7.78.0 fixed a system.net.* regression for networkv2 in Docker with host procfs. We carry no network_check.use_core_loader override, unlike disk_check.use_core_loader=false added for the disk check in STAC-24908 Resolved , so StackState/SUSE Observability inherits DataDog's networkv2 default.

Action

• Verify system.net.* metric parity and labels in SUSE Observability match the previous (Python) network check; mirror the disk-metric investigation in STAC-24908 Resolved .
• If parity breaks, add network_check.use_core_loader=false (Python loader) or align on the core check.

Ref: DD 7.73.0 + 7.78.0 release notes. Sibling of STAC-24908 Resolved . Surfaced during the DD 7.72 -> 7.78.2 release-note review.