enrich kubeskoop mellanox rdma metrics

[BSWANG]

No description provided.

[Copilot]

Pull Request Overview

This PR enriches kubeskoop's RDMA metrics collection by adding support for Mellanox hardware counters from the sysfs filesystem and expanding resource summary entries. The changes enhance RDMA monitoring capabilities with additional counter metrics and improved test coverage.

Key changes:

• Adds sysfs-based counter metrics collection for RDMA devices
• Expands resource summary entries to include "srq" (shared receive queue)
• Adds comprehensive test coverage for the new functionality

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
pkg/exporter/probe/rdma/rdma.go	Implements sysfs counter collection, adds netlink interface abstraction, and integrates new metrics into collection pipeline
pkg/exporter/probe/rdma/rdma_test.go	Adds comprehensive test suite covering sysfs metrics, error handling, and mock-based testing
pkg/exporter/probe/rdma/mellanox.go	Expands Mellanox counter definitions with general and hardware counters documentation
go.mod	Adds stretchr/objx test dependency

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}