feat(forge test): display block number used on fork tests

[HrikB]

Component

Forge

Describe the feature you would like

There are times that fork tests will fail on very specific blocks. Displaying the block number on which the fork test failed would be helpful in repro-ing the issue.

Ideally, this would show up even if there was no verbosity.

Additional context

No response

[mattsse]

@zerosnacks this can be combined with #7555 by including something like struct ForkInfo in the test result

[zerosnacks]

Originally planned to be included in #7555 but ended up not being merged.

Feature request is still relevant and makes sense