Accomodate new sync model type enumeration values for kSharedTabGroupData

Chromium change:
https://source.chromium.org/chromium/chromium/src/+/07390546c0f9718d03374d95d73ccfebeefe6816

commit 07390546c0f9718d03374d95d73ccfebeefe6816
Author: Tommy Nyquist <nyquist@chromium.org>
Date:   Wed Jan 31 01:44:02 2024 +0000

    [sync] Add scaffolding for new data sharing ModelType

    This CL adds the required scaffolding for a new data type for data
    sharing.

    Bug: b/319521964

chromium_src/components/sync/base/model_type_unittest.cc

@@ -21,7 +21,7 @@ TEST_F(ModelTypeTest, LowPriorityUserTypes) {
 
 // This test is supposed to fail when sync types are increased/decreased
 TEST_F(ModelTypeTest, ModelTypeCounts) {
-  EXPECT_EQ(static_cast<int>(ModelTypeForHistograms::kMaxValue), 62);
+  EXPECT_EQ(static_cast<int>(ModelTypeForHistograms::kMaxValue), 63);
 }
 
 }  // namespace