feat(its-hub): support its hub routing

[milapsheth]

AXE-3821

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 58.33333% with 10 lines in your changes missing coverage. Please review.

Project coverage is 95.95%. Comparing base (56e9084) to head (ae84671).

Files	Patch %	Lines
contracts/InterchainTokenService.sol	58.33%	6 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #265      +/-   ##
==========================================
- Coverage   97.56%   95.95%   -1.61%     
==========================================
  Files          18       18              
  Lines         574      594      +20     
  Branches      115      122       +7     
==========================================
+ Hits          560      570      +10     
- Misses          5       11       +6     
- Partials        9       13       +4     

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