FIO-9120: Fix issue with unchecking radio default value

[mikekotikov]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-9120

Description

What changed?

Added own version of resetValue method to the Radio component, since the inherited one was setting defaultValue instead of emptyValue, this made impossible unchecking all Radio values

Dependencies

None

How has this PR been tested?

Automated test is added

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