feat(interchain-token-service): add its hub contract

[milapsheth]

Description

AXE-3820

• Allow setting/removing trusted ITS addresses by chain
• Route ITS call to the true destination

Todos

• [x] Unit tests
• [ ] Manual tests
• [ ] Documentation
• [ ] Connect epics/issues

Steps to Test

Expected Behaviour

Other Notes

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 94.58239% with 24 lines in your changes missing coverage. Please review.

Project coverage is 93.68%. Comparing base (a73560d) to head (a9b1290). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
interchain-token-service/src/contract.rs	86.88%	8 Missing :warning:
interchain-token-service/src/bin/schema.rs	0.00%	7 Missing :warning:
interchain-token-service/src/msg.rs	25.00%	3 Missing :warning:
packages/axelar-wasm-std/src/response.rs	78.57%	3 Missing :warning:
interchain-token-service/src/abi.rs	99.01%	1 Missing :warning:
interchain-token-service/src/contract/execute.rs	98.78%	1 Missing :warning:
interchain-token-service/src/primitives.rs	88.88%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #572 +/- ## ========================================== + Coverage 93.66% 93.68% +0.02% ========================================== Files 226 233 +7 Lines 32583 32916 +333 ========================================== + Hits 30518 30837 +319 - Misses 2065 2079 +14 ```

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