add support for multiple local-preference

[AAYUSH2091]

SUMMARY

Adds support for single local-preference values in route maps with special characters (*,+,-).

Fixes the issue with local-preference values not being captured correctly in route-maps.

Fixes #516

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

iosxr_route_maps

[Ruchip16]

@AAYUSH2091 can you please add changelog

[AAYUSH2091]

@KB-perByte please review this once I have also added the integration tests as well to support multiple local-preference values.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.52%. Comparing base (8f9341d) to head (a14370d).
Report is 37 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #518      +/-   ##
==========================================
+ Coverage   76.91%   78.52%   +1.60%     
==========================================
  Files         166      182      +16     
  Lines       11298    11953     +655     
==========================================
+ Hits         8690     9386     +696     
+ Misses       2608     2567      -41     

see 120 files with indirect coverage changes