Check if the zk proof was generated from credential of trusted issuer

[Vishwas1]

We tried to implement the check here in this commit in the branch issuerValidate. but after wasm-optimization when we tried to upload the contract code to osmosis, we got this error:

osmosisd tx wasm store ./artifacts/issuer_kyc.wasm --from validator --gas-prices 0.025uosmo --gas auto --gas-adjustment 1.3 --node https://rpc.testnet.osmosis.zone/ --yes | jq -rcs '.[0].txhash'
Error: error in json rpc client, with http response metadata: (Status: 413 Request Entity Too Large, Protocol HTTP/1.1). error unmarshalling: invalid character '<' looking for beginning of value

we noticed that size of artifacts/issuer_kyc.wasm file has been increased by 3x from 780kb to 2.9mb because of bloock-poseidon-rs crate. We need to find out optimised way to use poseidon hash.