Cosmwasm refactor and preparation for parse price feeds (#895)

* Add more tests for update_fee_amount

Restructure code to split parsing and updating logic so that all
messages can be parsed without being applied

* Fix docker build command for cosmwasm contract

* Refactor is_fee_sufficient tests

Extract out the chain specific part into separate function
Merge test_accumulator_is_fee_sufficient back into is_fee_sufficient

* Rename function and simplify process_batch_attestation tests

Author: m30m

target_chains/cosmwasm/README.md

@@ -22,8 +22,8 @@ First, build the contracts within [the current directory](./). You must have Doc
 cd ./tools
 npm ci
 
-# if you want to build specifically for injective
-npm run build-contract -- --injective
+# if you want to build specifically for one chain
+npm run build-contract -- --[injective|osmosis]
 
 # else a generic cosmwasm contract can be build using
 npm run build-contract -- --cosmwasm