Prevent relation update from settings (#13099)

## Expected behavior

Described behavior regarding: (update | create) x (custom | standard) x
(icon, label, name, isSynced)

**Custom:**
- Field RELATION create: name, label, isSynced, icon should be editable
- Field RELATION update: name should not, icon label, isSynced should
- For other fields, icon, label, name, isSynced should be editable at
field creation | update

To simplify: Field RELATION name should not be editable at update

**Standards**
- Field: create does not makes sense
- Field: name should not, icon label, isSynced should (this will end up
in overrides)

To simplify, no Field RELATION edge case, name should not be editable at
update

**Note:** the FE logic is quite different as the UI is hiding some
details behind the syncWithLabel. See my comments and TODO there


## What I've tested:
(update | create) x (custom | standard) x (icon, label, name, isSynced,
description)

packages/twenty-front/src/pages/settings/data-model/SettingsObjectFieldEdit.tsx

@@ -215,10 +215,7 @@ export const SettingsObjectFieldEdit = () => {
               <SettingsDataModelFieldIconLabelForm
                 fieldMetadataItem={fieldMetadataItem}
                 maxLength={FIELD_NAME_MAXIMUM_LENGTH}
-                canToggleSyncLabelWithName={
-                  fieldMetadataItem.type !== FieldMetadataType.RELATION &&
-                  fieldMetadataItem.isCustom === true
-                }
+                isCreationMode={false}
               />
             </Section>
             {

packages/twenty-front/src/pages/settings/data-model/SettingsObjectNewField/SettingsObjectNewFieldConfigure.tsx

@@ -221,9 +221,7 @@ export const SettingsObjectNewFieldConfigure = () => {
             />
             <SettingsDataModelFieldIconLabelForm
               maxLength={FIELD_NAME_MAXIMUM_LENGTH}
-              canToggleSyncLabelWithName={
-                fieldType !== FieldMetadataType.RELATION
-              }
+              isCreationMode={true}
             />
           </Section>
           <Section>