FIO-8040: use core utils for evaluation instead of local ones

[AlexeyNikipelau]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-8040

Description

Previously, formio.js was using its own util function set for evalutions context. Now it's usng core functions.

Dependencies

formio/core#54

How has this PR been tested?

manually

Checklist:

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• My changes include tests that prove my fix is effective (or that my feature works as intended)
• New and existing unit/integration tests pass locally with my changes
• Any dependent changes have corresponding PRs that are listed above

[brendanbond]

This doesn't work because @formio/core doesn't expose that path via the "exports" param in its package.json, you can confirm by just running the tests

my vote is to ditch the "exports" field in both @formio/js and @formio/core, it doesn't do much for us (e.g. doesn't tree shake) and just makes it harder to use, if we need formUtil we should just export it from the library

[travist]

I did this here. 0c43678