fix: show correct read status on the message status component for a message

[khushal87]

The PR's goal is to show the correct read status(readBy number) on the message status component.

For 1:1 channels/group channels with only two users:

• We will no longer show the read count as it doesn't make sense since the only user who can read the message is the other user.
• We only update the check mark to double if the other user has read the message in the channel. This was buggy before. ⚠️

For channels with more group members:

• We will show a single check mark until no one has read the message in the channel. We do not show any read count until then.
• Update it to double as soon as someone reads the message and then show the count of how many other users have read the message. Previously, it included my read count as well, which was buggy. ⚠️

This is inline with the iOS SDK behaviour.

Linear issue - https://linear.app/stream/issue/RN-162/show-correct-read-status-on-the-message-status-component

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
js_bundle_size	467 KB	467 KB	0 B	🟢

[stream-ci-bot]

🎉 This PR is included in version 6.7.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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