refactor: Rewrite the function SysUtil.link_info_find() in a more pythonic way

[liangwen12year]

• Removed the unnecessary refresh argument since it wasn't used.
• Used None checks more idiomatically with if mac instead of is not None.
• Eliminated redundant variables and conditions to improve readability.
• Avoided using locals() by explicitly storing fallback results.
• Made ifname matching take priority before checking MAC addresses.
• Ensured that the function returns early when a definitive match is found.

Enhancement:

Reason:

Result:

Issue Tracker Tickets (Jira or BZ if any):

[codecov]

Codecov Report

Attention: Patch coverage is 5.88235% with 16 lines in your changes missing coverage. Please review.

Project coverage is 43.10%. Comparing base (89d7148) to head (7bf2105).
Report is 28 commits behind head on main.

Files with missing lines	Patch %	Lines
library/network_connections.py	5.88%	16 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #761       +/-   ##
===========================================
+ Coverage   20.40%   43.10%   +22.69%     
===========================================
  Files          10       12        +2     
  Lines        1485     3125     +1640     
  Branches      436        0      -436     
===========================================
+ Hits          303     1347     +1044     
- Misses       1181     1778      +597     
+ Partials        1        0        -1     

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