feat(server): Update XMP sidecar search to look for both photo.ext.xmp and photo.xmp (#7813)

* Add support for photo.xmp sidecars

* format

* Add comment

* Proper handling

* Handle mocking better

* Address PR feedback

* Add test coverage if both xmp files exist

* Update server/src/domain/metadata/metadata.service.ts

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

* Update server/src/domain/metadata/metadata.service.ts

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

* Update server/src/domain/metadata/metadata.service.ts

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>
Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

server/test/fixtures/asset.stub.ts

@@ -524,6 +524,42 @@ export const assetStub = {
     sidecarPath: '/original/path.ext.xmp',
     deletedAt: null,
   }),
+  sidecarWithoutExt: Object.freeze<AssetEntity>({
+    id: 'asset-id',
+    deviceAssetId: 'device-asset-id',
+    fileModifiedAt: new Date('2023-02-23T05:06:29.716Z'),
+    fileCreatedAt: new Date('2023-02-23T05:06:29.716Z'),
+    owner: userStub.user1,
+    ownerId: 'user-id',
+    deviceId: 'device-id',
+    originalPath: '/original/path.ext',
+    resizePath: '/uploads/user-id/thumbs/path.ext',
+    thumbhash: null,
+    checksum: Buffer.from('file hash', 'utf8'),
+    type: AssetType.IMAGE,
+    webpPath: null,
+    encodedVideoPath: null,
+    createdAt: new Date('2023-02-23T05:06:29.716Z'),
+    updatedAt: new Date('2023-02-23T05:06:29.716Z'),
+    localDateTime: new Date('2023-02-23T05:06:29.716Z'),
+    isFavorite: true,
+    isArchived: false,
+    isReadOnly: false,
+    isExternal: false,
+    isOffline: false,
+    libraryId: 'library-id',
+    library: libraryStub.uploadLibrary1,
+    duration: null,
+    isVisible: true,
+    livePhotoVideo: null,
+    livePhotoVideoId: null,
+    tags: [],
+    sharedLinks: [],
+    originalFileName: 'asset-id.ext',
+    faces: [],
+    sidecarPath: '/original/path.xmp',
+    deletedAt: null,
+  }),
 
   readOnly: Object.freeze<AssetEntity>({
     id: 'read-only-asset',