FIO 8049: fix value prop in evaluations

[brendanbond]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-8049

Description

• Since value is now a getter, we need to make it enumerable so that the Evaluator [correctly enumerates it]( into the arguments of the Function
• We also want to make sure that the component's value, if it exists, is passed in to the evaluation context

Breaking Changes / Backwards Compatibility

n/a

Dependencies

n/a

How has this PR been tested?

I added an automated test to describe behavior and the existing formio and formio-server tests are passing.

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