FIO-8100: add clearhidden processor to cover logic, conditions, and custom

[brendanbond]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-8100

Description

The conditionals processor originally cleared submission data properties for components that were conditionally hidden. However, this fails to account for other ways a component might be hidden, such as Advanced Logic or custom logic within the component. This PR changes the conditionals processor to merely set hidden to true on the component and adds a clearHidden processor that is responsible for unsetting any submission data tied to hidden components.

Breaking Changes / Backwards Compatibility

n/a

Dependencies

n/a

How has this PR been tested?

Automated + manual

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