Do not collate message if prev message is rating

[sushmi21]

The spacing below the Feedback submitted status pill is incorrect because of collation. So, this PR prevents message collation when the previous message is a rating feedback.

NOTE: Test this PR along with Cognigy/WebchatWidget#363 or after that PR is merged.
How to test:

• Build & Pack the chat-components folder
• install the package in webchat widget repo
• Use an endpoint pointing to a flow with request rating node or use this endpoint: https://endpoint-dev.cognigy.ai/a7f6316334debd965e4668ec402043e3498c69f0146fa4b96f29c059337eeab7
• Chat with the bot and provide a rating when prompted.
• After submitting the feedback 'Feedback submitted' status pill will appear in the history
• Now send another user message.
• The spacing between the pill and the following user message should be according to figma (Refer to User joined and Meeting confirmed status pills)

BEFORE

AFTER