fix: solve incorrect type when dealing with value in list

[jyling]

Description

Please include a summary of the changes and the related issues.
This fix solves the issue 3093 where the output coming from the dynamic form input has the wrong type. This lead to weird behaviour when selecting the options and also issue with updating the record on the admin UI.

My fix consists of overriding the value with the correct type, I'm unsure if this is a acceptable solution, but it does solve the issue.

For example.
I have a list of options from a custom field that contains numbers like calling code.
The options are meant to be strings of options. so it's configured like this

{
    name: "supportedNumbers"
    type: "string",
    label: [{ languageCode: LanguageCode.en, value: "Supported Phone Number" }],
    ui: { component: "select-form-input" },
    list: true,
    options: [

        // Usually we get this list from a library, but we 
        // can hard code it for now
        {
            value: "1",
            label: [{ languageCode: LanguageCode.en, value: "US" }]
        },
        {
            value: "60",
            label: [{ languageCode: LanguageCode.en, value: "MY" }]
        },
        {
            value: "61",
            label: [{ languageCode: LanguageCode.en, value: "SG" }]
        }
    ]
}

When I select the first option, the output will become like this

["1"]

The issue arises when my form input is a list, and I want to add the second option, which will cause the first option to turn into a number, so it will become like this

[1, "60"].

if I change the first input again, it will become like this

["61", 60]

Breaking changes

Does this PR include any breaking changes we should be aware of?
I'm not very sure, is there any test that I can run ?

Screenshots

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After

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Checklist

📌 Always:

• I have set a clear title
• My PR is small and contains a single feature
• [] I have checked my own PR

👍 Most of the time:

• I have added or updated test cases
• I have updated the README if needed

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