Fix multi-select dropdown for facilities in user creation module

[Dev-Harwani]

• Fixes #7762
• will be able to add multiple facilities without text getting wiped out.
• all the available facilities will be shown

https://github.com/coronasafe/care_fe/assets/131504127/fc803244-f576-466b-bf07-e2bc5ee92730

@coronasafe/care-fe-code-reviewers @coronasafe/code-reviewers

Merge Checklist

• [ ] Add specs that demonstrate bug / test a new feature.
• [ ] Update product documentation.
• [ ] Ensure that UI text is kept in I18n files.
• [ ] Prep screenshot or demo video for changelog entry, and attach it to issue.
• [ ] Request for Peer Reviews
• [ ] Completion of QA

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