refactor: move extraInformation to meta

The *Params datatypes have a meta field that can be filled with
any value as necesarry for the dataprovider, see UpdateParams here
https://github.com/marmelab/react-admin/blob/master/packages/ra-core/src/types.ts#L189-L194

It's better to use this value instead of polluting the data object

src/CreateGuesser.tsx

@@ -97,7 +97,8 @@ export const IntrospectedCreateGuesser = ({
         const response = await create(
           resource,
           {
-            data: { ...data, extraInformation: { hasFileField } },
+            data,
+            meta: { hasFileField },
           },
           { returnPromise: true },
         );

src/EditGuesser.tsx

@@ -121,7 +121,8 @@ export const IntrospectedEditGuesser = ({
           resource,
           {
             id,
-            data: { ...data, extraInformation: { hasFileField } },
+            data,
+            meta: { hasFileField },
           },
           { returnPromise: true },
         );
@@ -197,7 +198,7 @@ export const IntrospectedEditGuesser = ({
       id={id}
       mutationMode={mutationMode}
       redirect={redirectTo}
-      transform={(data) => ({ ...data, extraInformation: { hasFileField } })}
+      transform={(data) => data}
       {...props}>
       <FormType
         onSubmit={mutationMode !== 'pessimistic' ? undefined : save}

src/hydra/dataProvider.test.ts

@@ -265,9 +265,9 @@ describe('Transform a React Admin request to an Hydra request', () => {
       data: {
         bar: 'baz',
         foo: 'foo',
-        extraInformation: {
-          hasFileField: true,
-        },
+      },
+      meta: {
+        hasFileField: true,
       },
     });
     const url = mockFetchHydra.mock.calls?.[0]?.[0] ?? new URL('https://foo');
@@ -330,9 +330,9 @@ describe('Transform a React Admin request to an Hydra request', () => {
         foo: 'foo',
         bar: 'baz',
         qux: null,
-        extraInformation: {
-          hasFileField: true,
-        },
+      },
+      meta: {
+        hasFileField: true,
       },
       previousData: {
         id: '/entrypoint/resource/1',

src/hydra/dataProvider.ts

@@ -351,9 +351,8 @@ function dataProvider(
       }
     });
     let extraInformation: { hasFileField?: boolean } = {};
-    if ('data' in params && params.data.extraInformation) {
-      extraInformation = params.data.extraInformation;
-      delete params.data.extraInformation;
+    if ('meta' in params) {
+      extraInformation = params.meta;
     }
     const updateHttpMethod = extraInformation.hasFileField ? 'POST' : 'PUT';