Prevent watch stream from reconnecting after intentional pause or detach

[chacha912]

What happened:

Even after intentionally pausing or detaching, the watch stream attempts to reconnect.
When pausing or detaching, the cancelWatchStream() function is called but due to the onDisconnect, the watch stream is reconnected. This results in the peer receiving unwatched events followed by watched events again.

What you expected to happen:

Upon pausing or detaching, only unwatched events should occur without attempting to reconnect the watch stream.

How to reproduce it (as minimally and precisely as possible):

unwatched.mov

1. After running the quill-two-clients example, click on the manual sync button.
2. Observe that unwatched events are triggered.
3. Observe that watched events are triggered despite intentional pause.

Anything else we need to know?:

Environment:

• Operating system:
• Browser and version:
• Yorkie version (use yorkie version):
• Yorkie JS SDK version: