Add PQC base system test

[marcushines]

No description provided.

[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 introduces a suite of system-level tests designed to ensure that the device under test (DUT) correctly handles and supports Post-Quantum Cryptography (PQC) protocols. By utilizing a custom gRPC dialer with specific TLS curve preferences, the tests verify that secure connections can be established across various management and control plane interfaces.

Highlights

• New PQC System Tests: Added a new test suite to validate Post-Quantum Cryptography (PQC) support across multiple network protocols including gNMI, gNOI, gNSI, gRIBI, and P4RT.
• Custom TLS Configuration: Implemented a custom TLS dialer that enables the X25519Kyber768Draft00 key exchange mechanism to verify PQC handshake capabilities on the DUT.

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[OpenConfigBot]

Pull Request Functional Test Report for #5442 / 1cd8768

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		System-1.2: System g protocol test
Cisco 8000E		System-1.2: System g protocol test
Cisco XRd		System-1.2: System g protocol test
Juniper ncPTX		System-1.2: System g protocol test
Nokia SR Linux		System-1.2: System g protocol test
Openconfig Lemming		System-1.2: System g protocol test

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		System-1.2: System g protocol test
Cisco 8808		System-1.2: System g protocol test
Juniper PTX10008		System-1.2: System g protocol test
Nokia 7250 IXR-10e		System-1.2: System g protocol test

Help

[gemini-code-assist]

Code Review

This pull request adds a new test file to verify Post-Quantum Cryptography (PQC) protocol support for gNMI, gNOI, gNSI, gRIBI, and P4RT services. The reviewer provided several improvement opportunities, including adhering to the repository style guide by implementing TestMain and setupEnvironment, simplifying the logic for handling non-standard gRPC ports, and replacing deprecated gRPC functions. There is also a recommendation to use t.Fatalf for better error handling in the gNSI test.

[mihirpitale-googler]

lgtm