Merge branch 'kuba/ymaslenn/maint-26/ssh/ssh_channel_close_proper/OTP-19634' into maint

* kuba/ymaslenn/maint-26/ssh/ssh_channel_close_proper/OTP-19634:
  ssh: fix formatting
  Fixed some review comments
  Add channel close timer to closing procedure from our side
  Update channel close procedure
  Fix channel close procedure when the peer dies or our handler goes down

Author: u3s