le_audio: Handle late CIS connection event for joining device

This change adds handling of CIS connection event that will come after
receiving streaming ASE state notification. This may also happen when
establish data path event will come after getting streaming ASE state
notification.

Tag: #feature
Bug: 275663612
Test: atest StateMachineTest#testAttachDeviceToTheStreamCisFailure
Change-Id: Ib3183507779a5867311d63cc33f8a3c34b120bbe