feat(results): add ClickHouse nightly results backend with run-id pinning

[mparamas-amd]

Motivation

This PR Introduces a post-nightly upload_results workflow job that parses pytest-json-report artifacts and inserts structured summary + per-test-case rows into a ClickHouse table (rocmtests_nightly_results). Also the nightly workflow had been updated to accept direct run-id for artifacts.

Technical Details

framework/results/backends/clickhouse.py

• Self-contained upload script invoked as python -m framework.results.backends.clickhouse. It reads two artifact directories
  downloaded by the workflow and writes to a single converged ClickHouse table as below

Row type	Grain	Key columns
summary	1 row per platform per run	pass/fail/skip/error counts, GHA job URL, conclusion, artifact source run
case	1 row per test function per platform per run	nodeid, test_file, outcome, duration_secs, error_type, error_message, hw_marker, ci_marker, layer_marker, runtime_marker

Test Plan & Results

• pre-commit checks workflow pass
• clickhouse table populates post nightly workflow run