FIO-7724 fixed metadata for multiple select

[HannaKurban]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-7724

Description

Fixed incorrect metadata selectData setting for the Select component with multiple values

Breaking Changes / Backwards Compatibility

Use this section to describe any potentially breaking changes this PR introduces or any effects this PR might have on backwards compatibility

Dependencies

no

How has this PR been tested?

Automated tests have been 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