chore: refactor tests layout

[klkvr]

Motivation

Refactors tesdata durectory to separate default tests from cancun and potentially more directories.

Solution

Introduces ForgeTestProfile which manages configuration and layout of the test project.

[mattsse]

awesome,

I believe this is exactly what we need, and unlocks the blobfee/cancun related cheatcodes

mind taking a look at this @onbjerg ?

[mattsse]

this needs needs a few more docs

[mattsse]

this is great, the profile approach should be flexible to account for any additional future changes.

I'd like to see a few more docs on the new types

[onbjerg]

i think this should work

[mattsse]

lgtm