fix: Do not load the BN254 CRS for verifying client ivc proofs (#7556)

> since we are verifying we only need the g2_data part of the bn254 CRS
> (so you can pass size 0 or 1 or whatever small value doesn't error)

Thanks @codygunton for the tip!

barretenberg/cpp/src/barretenberg/bb/main.cpp

@@ -405,7 +405,7 @@ bool verify_client_ivc(const std::filesystem::path& proof_path,
                        const std::filesystem::path& eccvm_vk_path,
                        const std::filesystem::path& translator_vk_path)
 {
-    init_bn254_crs(1 << 24);
+    init_bn254_crs(1);
     init_grumpkin_crs(1 << 14);
 
     const auto proof = from_buffer<ClientIVC::Proof>(read_file(proof_path));