Remove module_query_safe for x/auth's bech32 grpc queries

[amaury1093]

Summary

Remove module_query_safe annotations for these 3 queries:

cosmos-sdk/proto/cosmos/auth/v1beta1/query.proto

Lines 61 to 83 in 04db139

	// Bech32Prefix queries bech32Prefix
	//
	// Since: cosmos-sdk 0.46
	rpc Bech32Prefix(Bech32PrefixRequest) returns (Bech32PrefixResponse) {
	option (cosmos.query.v1.module_query_safe) = true;
	option (google.api.http).get = "/cosmos/auth/v1beta1/bech32";
	}
	// AddressBytesToString converts Account Address bytes to string
	//
	// Since: cosmos-sdk 0.46
	rpc AddressBytesToString(AddressBytesToStringRequest) returns (AddressBytesToStringResponse) {
	option (cosmos.query.v1.module_query_safe) = true;
	option (google.api.http).get = "/cosmos/auth/v1beta1/bech32/{address_bytes}";
	}
	// AddressStringToBytes converts Address string to bytes
	//
	// Since: cosmos-sdk 0.46
	rpc AddressStringToBytes(AddressStringToBytesRequest) returns (AddressStringToBytesResponse) {
	option (cosmos.query.v1.module_query_safe) = true;
	option (google.api.http).get = "/cosmos/auth/v1beta1/bech32/{address_string}";
	}

Problem Definition

The 3 queries are state-machine safe only if the app developer doesn't change the bech32 prefix argument passed into NewAccountKeeper in their app.go.

Tthere's a tiny chance it breaks consensus.

Proposal

• Remove the annotations
• Remove deterministic tests