Benchmark NFT bridging path & find optimization opportunities

[sisyphusSmiling]

Issue To Be Solved

Bridging is currently very computationally expensive, especially for Cadence-native NFTs to EVM. Initial suspicions focus on the bulk of computation resulting from the process of serializing NFTs - the mechanism used to bridge the NFT's metadata to the resulting ERC721. This suspicion should be validated and quantified before beginning to optimize.

Context

The Flow Reference Wallet team (@JeffreyDoyle @lmcmz) would like to bridge large numbers of NFTs in a single transaction and can only reliably bridge about 9 at a time. This limitation blocks core user-facing functionality.