[CLNP-5981] fix blinking GroupChannel on switching to another (#1277)

Fixes https://sendbird.atlassian.net/browse/CLNP-5981 and applied the
same approach in
#1272

### Checklist

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creating the PR. If unsure, ask the members.
This is a reminder of what we look for before merging your code.

- [x] **All tests pass locally with my changes**
- [ ] **I have added tests that prove my fix is effective or that my
feature works**
- [ ] **Public components / utils / props are appropriately exported**
- [ ] I have added necessary documentation (if appropriate)

Author: AhyoungRyu

src/modules/GroupChannel/context/GroupChannelProvider.tsx

@@ -298,14 +298,14 @@ const GroupChannelManager :React.FC<React.PropsWithChildren<GroupChannelProvider
     });
   }, [
     channelUrl,
-    state.currentChannel,
-    messageDataSource.initialized,
-    messageDataSource.loading,
-    messageDataSource.messages,
+    state.currentChannel?.serialize(),
     configurations,
     scrollState,
     eventHandlers,
     renderProps,
+    messageDataSource.initialized,
+    messageDataSource.loading,
+    messageDataSource.messages.map(it => it.serialize()),
   ]);
 
   return children;

src/modules/GroupChannel/context/__tests__/GroupChannelProvider.spec.tsx

@@ -8,6 +8,7 @@ const mockLogger = { warning: jest.fn() };
 const mockChannel = {
   url: 'test-channel',
   members: [{ userId: '1', nickname: 'user1' }],
+  serialize: () => JSON.stringify(this),
 };
 
 const mockGetChannel = jest.fn().mockResolvedValue(mockChannel);
@@ -17,6 +18,7 @@ const mockMessageCollection = {
   initialize: jest.fn().mockResolvedValue(null),
   loadPrevious: jest.fn(),
   loadNext: jest.fn(),
+  messages: [],
 };
 jest.mock('../../../../lib/Sendbird/context/hooks/useSendbird', () => ({
   __esModule: true,

src/modules/GroupChannel/context/__tests__/useGroupChannel.spec.tsx

@@ -10,6 +10,7 @@ const mockLogger = { warning: jest.fn() };
 const mockChannel = {
   url: 'test-channel',
   members: [{ userId: '1', nickname: 'user1' }],
+  serialize: () => JSON.stringify(this),
 };
 
 const mockGetChannel = jest.fn().mockResolvedValue(mockChannel);
@@ -19,6 +20,7 @@ const mockMessageCollection = {
   initialize: jest.fn().mockResolvedValue(null),
   loadPrevious: jest.fn(),
   loadNext: jest.fn(),
+  messages: [],
 };
 const mockMarkAsReadScheduler = { push: jest.fn() };
 jest.mock('../../../../lib/Sendbird/context/hooks/useSendbird', () => ({
@@ -276,7 +278,7 @@ describe('useGroupChannel', () => {
         });
       });
       it('scroll to message when message exists', async () => {
-        const mockMessage = { messageId: 123, createdAt: 1000 };
+        const mockMessage = { messageId: 123, createdAt: 1000, serialize: () => JSON.stringify(this) };
         const mockStore = createMockStore({
           messages: [mockMessage],
           scrollRef: { current: document.createElement('div') },