Fix: Metamask relies on incorrect eth_ RPC endpoint for gas estimation

[sambacha]

core/packages/gas-fee-controller/src/gas-util.ts

Line 123 in f3636ad

const gasPrice = await query(ethQuery, 'gasPrice');

eth_estimateGas RPC should not be used for 1559 estimations, instead eth_feeHistory should be used: https://github.com/ethereum/execution-apis/blob/main/src/eth/fee_market.yaml

[matthewwalsh0]

This is only a fallback if the chain is not supported by our gas fee API, which does use eth_feeHistory to calculate a more accurate estimate.

Though eth_gasPrice should still be functional on EIP-1559 as we use it to set the maxFeePerGas and maxPriorityFeePerGas.