cli-transaction: Use the new rebase support

Switch to the new eol signal and call flatpak_transaction_add_rebase()
if a rebase was requested.

Closes: #2775
Approved by: alexlarsson
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Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f