Insufficient funds error in Faucet modal

[defispartan]

Describe the bug

The V3 testnet redeployment #1709 uses permisionless faucet with per-tx limit instead of permissioned faucet executed via backend, so all faucet txns will need the base token of the network.

Currently the faucet modal doesn't handle INSUFFICIENT_FUNDS RPC error and display generic tx error.

To Reproduce

Try to faucet a reserve on a permisionless faucet market (V3 Scroll Alpha or any V3 testnet post #1709) with an empty wallet

Expected behavior

Error message specifying that wallet needs funds to pay for transaction gas.