Added observability tests for PCI Spyre adapter

Added tests to validate AIU-SMI observability and
Acelyzer trace analysis functionality on Spyre AIU
devices during inferencing.

Features:

- Creates a containerized VLLM environment
- Starts continuous inference in the background
- Captures aiu-smi metrics continuously for a
  specified duration
- Validates that metrics are successfully captured
  and contain expected data
- Integrates Acelyzer (aiu-trace-analyzer) for
  post-processing JSON trace files
- Generates FLEX timing traces during inference
  workloads
- Analyzes traces with enhanced statistics for
  performance analysis
- Validates trace generation and successful acelyzer
  processing

Test Methods:
- test_aiu_smi_observability: Validates AIU-SMI metrics collection
- test_acelyzer: Validates trace generation and acelyzer analysis

Signed-off-by: Sai Janani C <jananic@linux.ibm.com>

Author: saijanani-c