[cmis] Optimize cmis.get_error_description speed for passive module

[Junchao-Mellanox]

Description

cmis.get_error_description is very slow for passive module:

>>> begin = time.time()
>>> s.get_error_description()
'ModuleLowPwr'
>>> print(time.time() - begin)
2.905252695083618

For a module that has flat memory, it does not need check data path state. Because of this issue, show error-status --fetch-from-hardware takes very long time if there is many passive module present:

real    1m12.116s
user    0m5.852s
sys     0m15.491s

After the fix, it changes to:

real    0m1.051s
user    0m0.499s
sys     0m0.059s

Motivation and Context

Optimize cmis.get_error_description for passive module

How Has This Been Tested?

Manual test
Unit test

Additional Information (Optional)