FIO-10822: fixed an issue where evaluations donot work if returned variable is in middle of the custom logic or is not 'value'

[TanyaGashtold]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-10822

Description

What changed?

Fixed evaluations for use case when expected returned value is not 'value' but 'valid' or some other + fixed issue where returned value is not in the first line of custom logic.

How has this PR been tested?

Manually

Checklist:

• I have completed the above PR template
• 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