IBperf logging improvement

[sarachoi-amd]

Motivation

Goals: Make ibperf test logs easier to read and grep, with less SSH noise, while keeping the result and verification output

Technical Details

Files changed:

• cvs/lib/ibperf_lib.py
• cvs/tests/ibperf/ib_perf_bw_test.py
• cvs/tests/ibperf/install_ibperf_tools.py

What improved:

• Logging infrastructure: switched to the standard logging module and added structured helpers for bandwidth/latency summaries and run-completion messages
• Less console noise: suppressed remote command output, kept concise INFO summaries and moved verbose details to DEBUG
• Code cleanup / deduplication: consolidated ROCm path detection and added caching to avoid repeated SSH lookups
• Test script improvements: improved test logging across install and perf scripts, reduced verbosity, and added install skip notification
• Minor fixes: added empty-result guards and removed redundant log lines

Test Plan

ran ib_perf_bw_test

Test Result

The test passed, with the log file size was reduced by half.

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.