[feat] Full live environment support for all features

[mrVectorz]

Summary

Several features currently only work in sosreport (--local) mode and need to be extended to work on live systems:

Container filters on live systems

The container filter flags (--container-name, --pod-name, --container-id, --annotation, --pci-device) added in #2 are restricted to --local mode. Supporting them on live systems requires implementing load_all_container_data() for live environments (currently it only works with sosreport directories). On a live system, this would enumerate all containers via crictl ps / crictl inspect and build the same data structures that the sosreport path uses.

Live environment testing

There is currently no test coverage for live system mode. We need:

• A test harness that can validate live-mode behavior (possibly using mock /proc and /sys trees, or a containerized test environment)
• Tests for filter flags on live systems once they are supported
• Validation that all analyzers (IRQ, NUMA, LLC) produce consistent output between live and sosreport modes for the same system

Scope

• Implement load_all_container_data() for live systems in shared_data.py
• Remove the --local requirement for filter flags
• Add live-path pod_name/annotations fields where missing (partially done in numa/llc analyzers for single-container paths)
• Add test infrastructure for live mode validation