hardhat-ethers getBlockNumber is wrong after a call to hardhat_reset.

[alcuadrado]

This bug was reported on discord.

If you use hardhat-ethers, for example, the sample project, and run:

await ethers.provider.send("evm_mine");
await ethers.provider.send("evm_mine");
await ethers.provider.getBlockNumber(); // 2

await ethers.provider.send("hardhat_reset");
await ethers.provider.getBlockNumber(); // 2 -- should be 0
await network.provider.send("eth_blockNumber") // '0x0'