tests: Improve secp256k1_ge_set_all_gej_var for some infinity inputs
tests: Improve secp256k1_ge_set_all_gej_var for some infinity inputs

bitcoin/secp256k1,bitcoin/secp256k1,ElementsProject/secp256k1-zkp,peterdettman/secp256k1,bitcoin/secp256k1,bitcoin/secp256k1,peterdettman/secp256k1,bitcoin-core/secp256k1,bitcoin-core/secp256k1,bitcoin/secp256k1,ElementsProject/secp256k1-zkp