IBC omnichain integration

[lumtis]

Track tasks for IBC integration into omnichain smart contracts

Some state of researches: #1768

Tasks

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1. Add IBC support by importing the IBC transfer module #1510
   c:cosmos +1
   
2. Initialize the module ibc-crosschain #2128
   m:ibc-crosschain +1
   
3. Add a field in static chain data describing the way to transport messages with the external chains #2129
   +0
   
4. Remove coupling crosschain <-> observer #2130
   m:crosschain +1
5. Add interaction with crosschain module on omnichain call from IBC trasnfers #2131
   m:crosschain m:ibc-crosschain +2
6. Add E2E test with IBC chain #2132
   E2E m:ibc-crosschain +2
7. Add ibc-crosschain as a IBC middleware for the IBC transfer module #2163
   m:ibc-crosschain +1
8. Initialize querier for ibc-crosschain #2166
   m:ibc-crosschain +1
9. Allow to have chain with non-Integer chain IDs #2253
   +0