Downstream/02 client refactor

[TxCorpi0x]

Description

Downstream the changes of upstream cosmos repo closes: #19

Tasks to do

• [x] Change UpdateState return type
• [x] Match Merkle tree index type (changed to uint64)
• [x] Generate new proto generated types
• [x] Use merkle Keccak256Hasher instead of local duplication

[codecov-commenter]

Codecov Report

Merging #20 (1353578) into main (427691f) will increase coverage by 1.10%. The diff coverage is 85.78%.

@@            Coverage Diff             @@
##             main      #20      +/-   ##
==========================================
+ Coverage   73.65%   74.76%   +1.10%     
==========================================
  Files         157      172      +15     
  Lines       11543    12649    +1106     
==========================================
+ Hits         8502     9457     +955     
- Misses       2617     2738     +121     
- Partials      424      454      +30     

Impacted Files	Coverage Δ
...7-interchain-accounts/controller/keeper/account.go	72.72% <ø> (ø)
...27-interchain-accounts/controller/keeper/keeper.go	94.78% <0.00%> (-1.68%)	:arrow_down:
modules/apps/29-fee/types/ack.go	0.00% <0.00%> (ø)
modules/apps/transfer/keeper/genesis.go	89.47% <ø> (+6.14%)	:arrow_up:
modules/apps/transfer/keeper/keeper.go	94.20% <ø> (-0.17%)	:arrow_down:
modules/core/02-client/legacy/v100/solomachine.go	5.97% <0.00%> (ø)
modules/core/04-channel/types/packet.go	67.56% <0.00%> (-14.40%)	:arrow_down:
modules/core/04-channel/types/version.go	100.00% <ø> (ø)
...dules/light-clients/06-solomachine/types/header.go	89.65% <ø> (+5.78%)	:arrow_up:
modules/light-clients/11-beefy/types/header.go	0.00% <ø> (ø)
... and 44 more