@bassemfg
Those are all local repos, installed in /var/, the ephemeral GPG pubkey for each is located in its directory, for example
ls /var/cudnn-local-repo-ubuntu2204-8.9.3.28/cudnn-local-7F7A158C-keyring.gpg
As prompted during installation of the local repo, copy the keyring to /usr/share/keyrings/
(see: NVIDIA CUDA Installation Guide for Linux)