[txn-emitter] fix nft_mint_and_transfer

[lightmark]

Description

now cargo test test_txn_emmitter -- --nocapture --ignored works. but it takes "1678.65s" to run because for each of our 240 workers, the initial setup takes several seconds to fund the nft_faucet account.

Test Plan

cargo test test_txn_emmitter -- --nocapture --ignored

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This change is 

[dariorussi]

@lightmark not sure if this is a side effect of this fix or if the behavior was always there but cargo test test_txn_emmitter -- --ignored never terminates, whereas if I comment out this line (TransactionType::NftMintAndTransfer, 10), in txn_emitter.rs the test terminates after a number of seconds. Not sure what the expectation is and it's not a big deal for me, but I figured I'd mention

[lightmark]

@dariorussi see the description on the PR. It takes almost half an hour to finish because the setup take several seconds for each worker and we have 240 workers. Donno whether it is an issue for txn-emitter... @igor-aptos I guess I can just do it for my local forge test if it's not okay.