SYS-1.1 Add strata platform support to default_copp_test

[keil-arista]

The default_copp_test hardcodes "sand" in the OpenConfig vendor path and uses sand-specific counter names. Strata platform devices (e.g. DCS-7050CX4M-48D8-F) require different counter names and a different vendor path element. This change detects the platform dynamically from the gNMI response and selects the appropriate counter mapping.

• (M) feature/system/control_plane_traffic/otg_tests/default_copp_test/default_copp_test.go
  • Add platformConfig struct and counter name maps for sand vs strata.
  • Replace hardcoded "sand" path element with detected platform name.

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the default_copp_test to support the Strata platform alongside the existing Sand platform. By dynamically detecting the hardware platform via gNMI, the test now correctly selects the appropriate counter mappings for control plane traffic. Additionally, it introduces a new deviation to gracefully handle platform-specific limitations where L2 unicast packets are dropped before reaching the CPU, ensuring test reliability across different Arista hardware models.

Highlights

• Dynamic Platform Detection: Implemented dynamic platform detection for the default_copp_test by querying the gNMI vendor path, allowing the test to switch between 'sand' and 'strata' counter mappings automatically.
• Strata Platform Support: Added specific counter name mappings for the Strata platform and introduced a new deviation, 'CoppL2UnicastUnsupported', to skip L2 unicast CoPP tests on these devices.
• Metadata Updates: Updated metadata.textproto to include hardware model regex for Arista sand and strata platforms, and added the new deviation field to the metadata protocol buffers.

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[OpenConfigBot]

Pull Request Functional Test Report for #5460 / 1125c20

Virtual Devices

Device	Test	Status	Test Documentation	Job	Raw Log
Arista cEOS		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista
Cisco 8000E		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista
Cisco XRd		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista
Juniper ncPTX		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista
Nokia SR Linux		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista
Openconfig Lemming		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista

Hardware Devices

Device	Test	Status	Test Documentation	Raw Log
Arista		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista
Cisco		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista
Juniper		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista
Nokia		SYS-1.1: pending authorization	SYS-1.1: Test default COPP policy thresholds for Arista

Help

[gemini-code-assist]

Code Review

This pull request introduces platform-specific COPP (Control Plane Policing) counter validation by dynamically detecting the platform type and mapping logical counters to platform-specific names. It also adds a new deviation, CoppL2UnicastUnsupported, to handle hardware that does not support L2 unicast counter validation. Feedback includes a requirement to add issue tracker links to deviation functions per the style guide, and recommendations to use the test context in gNMI requests within helper functions to ensure proper timeout and cancellation handling.