Bug: wsLink doesn't wait for urlConnectionParams to be sent.

[hmatthieu]

          @hmatthieu with the new wsLink in this pull request I'm now having an issue where the connectionParams message is not the first message sent over the wire. I use it to send authentication token to the server but now my initial subscriptions on the frontend are failing because the subscription messages are sent before the connectionParams message upon connection.

Originally posted by @TomKaltz in #6223 (comment)

[TomKaltz]

This bug was introduced in #6223. I can confirm that #6547 fixes this bug.

[github-actions]

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