add test_gpu_cache_info unit test

[alibukharai]

Adding a unit test case for amdsmi_get_gpu_cache_info API

Tested the output:

#######################################################################
========> test_cache start <========
 
 
###Test Processor 0, bdf: 0000:03:00.0
 
###Test amdsmi_get_gpu_cache_info
 
  cache_usage['cache_properties'] is: ['DATA_CACHE', 'SIMD_CACHE']
  cache_usage['cache_size'] is: 32
  cache_usage['cache_level'] is: 1
  cache_usage['max_num_cu_shared'] is: 10
  cache_usage['num_cache_instance'] is: 96
  cache_usage['cache_properties'] is: ['INST_CACHE', 'SIMD_CACHE']
  cache_usage['cache_size'] is: 32
  cache_usage['cache_level'] is: 1
  cache_usage['max_num_cu_shared'] is: 2
  cache_usage['num_cache_instance'] is: 30
  cache_usage['cache_properties'] is: ['DATA_CACHE', 'SIMD_CACHE']
  cache_usage['cache_size'] is: 4096
  cache_usage['cache_level'] is: 2
  cache_usage['max_num_cu_shared'] is: 60
  cache_usage['num_cache_instance'] is: 1
  cache_usage['cache_properties'] is: ['DATA_CACHE', 'SIMD_CACHE']
  cache_usage['cache_size'] is: 65536
  cache_usage['cache_level'] is: 3
  cache_usage['max_num_cu_shared'] is: 60
  cache_usage['num_cache_instance'] is: 1
 
 
========> test_cache end <========
#######################################################################