Fixes: #7925
The `MessageHistory.write()` creates not only a new instance of the `MessageHistory`,
but also a new copy of the whole message.
This significantly impacts the performance when we have too many components to track
* Make `MessageHistory` as append-only container and create a new instance (plus message)
only on the first track when no prior history is present
* Change `WireTap`, `BroadcastingDispatcher`, `AbstractMessageRouter` and `AbstractMessageSplitter`
to use a new `AbstractIntegrationMessageBuilder.cloneMessageHistoryIfAny()` API for every branch a message
is produced.
Essentially, create a new message with copy of the message history to let that downstream sub-flow
have its own trace
* Modify failed unit tests for a new logic where message history header is not immutable anymore
* This also fixes an `AbstractMessageSplitter` for propagating its track into messages it emits
* * Do not clone message history header if only one consume in multi-publish
* Fix typos in docs
2731e9411e