Admin Generator: fix initiallyExpanded prop not set if false

[manuelblum]

Description

fix Form Generator. If initiallyExpanded is set to false, the initiallyExpanded prop did not get set on the Fieldset Component. This is wrong, because internally the Fieldset Component has a default value assigned to initiallyExpanded of true

Sample Code:

export const ProductForm: FormConfig<GQLProduct> = {
    type: "form",
    gqlType: "Product",
    fragmentName: "ProductFormDetails", // configurable as it must be unique across project
    fields: [
        {
            type: "fieldSet",
            name: "mainData",
            collapsible: true,
            initiallyExpanded: true,
            fields: [
                {
                    type: "text",
                    name: "title",
                },
            ],
        },
        {
            type: "fieldSet",
            name: "additionalData",
            collapsible: true,
            initiallyExpanded: false,
            fields: [
                {
                    type: "boolean",
                    name: "inStock",
                },
            ],
        },
    ],
};

Problem

Screenshots

Before	After

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Task: https://vivid-planet.atlassian.net/browse/COM-1630

[johnnyomair]

We decided that we don't add changesets for the future Admin Generator since it hasn't been officially released yet. Please remove the changeset.