Fixes: #9297
For a normal `jakarta.mail.StoreClosedException: * BYE Jakarta Mail Exception: java.net.SocketException: Connection reset`
the `ImapIdleChannelAdapter.callIdle()` results in a resubmission (and reconnection)
with logging 'Failed to execute IDLE task. Will attempt to resubmit in 10000 milliseconds.'`
However, when `selectorExpression` is in used and that one is based on mail `Message` object,
we may fail with `FolderClosedException` which is wrapped to the `SpelEvaluationException` and some
other stack traces.
So, `jakarta.mail.MessagingException` might be deep in the cause chain.
* Fix `ImapIdleChannelAdapter` via introducing `getJakartaMailMessagingExceptionFromCause()` utility
method which searches for the `jakarta.mail.MessagingException` in cause chain.
* Rework `ImapIdleChannelAdapter.callIdle()` logic to rely on this new method
**Auto-cherry-pick to `6.3.x` & `6.2.x`**
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