api!: rename path to merkle path for contract api json msgs (backport #6962) (#7207)

* api!: rename path to merkle path for contract api json msgs  (#6962)

* api!: rename path to merkle path for contract api json msgs

* fix

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Co-authored-by: DimitrisJim <d.f.hilliard@gmail.com>
(cherry picked from commit 5a6b4ae)

# Conflicts:
#	modules/light-clients/08-wasm/CHANGELOG.md

* fix conflict

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Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

Author: mergify[bot]

modules/light-clients/08-wasm/CHANGELOG.md

@@ -44,7 +44,6 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### API Breaking
 
-* [\#6644](https://github.com/cosmos/ibc-go/pull/6644) api!: add `v2.MerklePath` for contract api `VerifyMembershipMsg` and `VerifyNonMembershipMsg` structs. Note, this requires a migration for existing client contracts to correctly handle deserialization of `MerklePath.KeyPath` which has changed from `repeated string` to `repeated bytes`. In JSON message structures this change is reflected as the `KeyPath` being a marshalled as a list of base64 encoded byte strings. 
 * [\#6937](https://github.com/cosmos/ibc-go/pull/6937) Remove `WasmConsensusHost` implementation of the `ConsensusHost` interface.
 
 ### State Machine Breaking

modules/light-clients/08-wasm/types/contract_api.go

@@ -70,7 +70,7 @@ type VerifyMembershipMsg struct {
 	DelayTimePeriod  uint64                       `json:"delay_time_period"`
 	DelayBlockPeriod uint64                       `json:"delay_block_period"`
 	Proof            []byte                       `json:"proof"`
-	Path             commitmenttypesv2.MerklePath `json:"path"`
+	Path             commitmenttypesv2.MerklePath `json:"merkle_path"`
 	Value            []byte                       `json:"value"`
 }
 
@@ -80,7 +80,7 @@ type VerifyNonMembershipMsg struct {
 	DelayTimePeriod  uint64                       `json:"delay_time_period"`
 	DelayBlockPeriod uint64                       `json:"delay_block_period"`
 	Proof            []byte                       `json:"proof"`
-	Path             commitmenttypesv2.MerklePath `json:"path"`
+	Path             commitmenttypesv2.MerklePath `json:"merkle_path"`
 }
 
 // VerifyUpgradeAndUpdateStateMsg is a sudoMsg sent to the contract to verify an upgrade and update its state.