Remove unused evm error messages and move error messages map object into constructor class

[am1r021]

This is a followup issue to make some improvements brought up in #3968 by @jochem-brouwer:

• Remove unused error messages in EOFError error message map
• Move the EVMErrorMessages object into the EVMError constructor class as a static field
• Make errorType on EVMError a constant somewhere and export it such that is reads from that variable? Then if we change it in the future, we don't run in the similar problem

[jochem-brouwer]

I noticed in the PR #3968 we also use EvmErrorResult. Could you also re-capitalize this to EVMErrorResult in this issue? And could you check if we have more of these wrongly cased objects in evm? 😄 👍

[holgerd77]

Can we fully forbid the string „Evm“ by spell checker?