[Feature]: e2e Error Assertion Failure Messages Should Include Both the Expected and the Actual Error

[0xNeshi]

What is the feature you would like to see?

Let's say the we assert an error occurred during contract execution like:

    assert!(err.reverted_with(Erc20FlashMint::ERC3156InvalidReceiver {
        receiver: Address::ZERO
    }),);

And let's say when running the test that this assertion fails.

Currently, this would produce the following error message:

assertion failed: err.reverted_with(Erc20FlashMint::ERC3156InvalidReceiver {
        receiver: Address::ZERO,
    })

A much more helpful error message would also show the actual error that occurred.

Proposal (open to suggestions):

assertion failed: err.reverted_with(Erc20FlashMint::ERC3156InvalidReceiver {
        receiver: Address::ZERO,
    })

expected:
    Erc20FlashMint::ERC3156InvalidReceiver {
        receiver: 0x0000000000000000000000000000000000000000,
    })
actual:
    Erc20FlashMint::ERC3156InvalidReceiver {
        receiver: 0xF4EaCDAbEf3c8f1EdE91b6f2A6840bc2E4DD3526,
    })

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