chore!: admin now takes a client side custom property and custom is server only (#5926)

packages/ui/src/providers/ComponentMap/buildComponentMap/fields.tsx

@@ -200,7 +200,7 @@ export const mapFields = (args: {
           CustomDescription,
           CustomError,
           CustomLabel,
-          custom: field.custom,
+          custom: 'admin' in field && 'custom' in field.admin ? field.admin?.custom : undefined,
           descriptionProps,
           disabled: 'admin' in field && 'disabled' in field.admin ? field.admin?.disabled : false,
           errorProps,
@@ -296,6 +296,7 @@ export const mapFields = (args: {
 
               const reducedBlock: ReducedBlock = {
                 slug: block.slug,
+                custom: block.admin?.custom,
                 fieldMap: blockFieldMap,
                 imageAltText: block.imageAltText,
                 imageURL: block.imageURL,
@@ -756,7 +757,7 @@ export const mapFields = (args: {
             <WithServerSideProps Component={CustomFieldComponent} {...fieldComponentProps} />
           ) : undefined,
           cellComponentProps,
-          custom: field.custom,
+          custom: field?.admin?.custom,
           disableBulkEdit:
             'admin' in field && 'disableBulkEdit' in field.admin && field.admin.disableBulkEdit,
           fieldComponentProps,