fix: demote safe eth methods to basic tests

[LesnyRumcajs]

Summary of changes

Changes introduced in this pull request:

• we have no means of ensuring two nodes are completely in sync with regards to the chain head. As such, we can't, with the current setup, check for parity of methods relying on that.

Reference issue to close (if applicable)

Closes #4661

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.