FIO-9259 fixed errors list for parent wizard with nested wizard

[HannaKurban]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-9259

Description

Previously, the parent wizard form displayed all the errors of the child wizard form when clicking the Next button. The issue became relevant after correcting the incorrect order of arguments for the checkValidity method. The problem has been fixed by adding an additional check for the embedded child form

Breaking Changes / Backwards Compatibility

n/a

Dependencies

n/a

How has this PR been tested?

Automated tests have been added. All test pass locally

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