[Snapshot and restore] Set file system repo compression to true by default (#221500)

Closes #210481

So far, file system was the only type of repository that had compression
set to false by default. But according with the [ES docs
](https://www.elastic.co/docs/deploy-manage/tools/snapshot-and-restore/shared-file-system-repository)
that default is true:

```
compress
(Optional, Boolean) If true, metadata files, such as index mappings and settings, are compressed in snapshots. Data files are not compressed. Defaults to true.
```
So this PR sets the default to true for FS.



https://github.com/user-attachments/assets/b14e24a9-0330-4cbf-863b-102030d70f92

Author: SoniaSanzV

x-pack/platform/plugins/private/snapshot_restore/__jest__/client_integration/repository_add.test.ts

@@ -236,7 +236,7 @@ describe('<RepositoryAdd />', () => {
               type: fsRepository.type,
               settings: {
                 location: fsRepository.settings.location,
-                compress: true,
+                compress: false,
                 chunkSize: fsRepository.settings.chunkSize,
                 maxSnapshotBytesPerSec: fsRepository.settings.maxSnapshotBytesPerSec,
                 maxRestoreBytesPerSec: fsRepository.settings.maxRestoreBytesPerSec,

x-pack/platform/plugins/private/snapshot_restore/public/application/components/repository_form/type_settings/fs_settings.tsx

@@ -133,7 +133,7 @@ export const FSSettings: React.FunctionComponent<Props> = ({
                 defaultMessage="Compress snapshots"
               />
             }
-            checked={!!compress}
+            checked={!(compress === false)}
             onChange={(e) => {
               updateRepositorySettings({
                 compress: e.target.checked,

x-pack/test/functional/page_objects/snapshot_restore_page.ts

@@ -249,7 +249,6 @@ export function SnapshotRestorePageProvider({ getService }: FtrProviderContext)
     },
     async createSourceOnlyRepositoryStepTwo(location: string) {
       await testSubjects.setValue('locationInput', location);
-      await testSubjects.click('compressToggle');
       await testSubjects.click('submitButton');
       await retry.waitFor('repository list to be visible', async () => {
         return await testSubjects.isDisplayed('repositoryList');