No crossing hellos on opening handshake

[mpoke]

In Interchain Security, the ChanOpenInit message must go to the consumer, i.e., the provider returns an error on any Init messages, see

interchain-security/x/ccv/provider/module.go

Line 238 in f3a9966

return sdkerrors.Wrap(ccv.ErrInvalidChannelFlow, "channel handshake must be initiated by consumer chain")

As a result, it is not possible to have crossing hellos, which means that the provider must claim directly the channel capability in OnChanOpenTry, without needing to check if it already claimed the capability, see

interchain-security/x/ccv/provider/module.go

Line 264 in f3a9966

// Module may have already claimed capability in OnChanOpenInit in the case of crossing hellos