MDE Deployment on Debian 12 Bookworm - GPG Key install issue -> apt-key deprecated

[cmur]

gpg-keys are handled in a new way on Debian 12 (and probably above) -> apt-key deprecated
the same issue could happen on ubuntu 22/24, because apt-key is also deprecated (https://medium.com/@glegoux/ubuntu-22-04-jammy-jellyfish-apt-key-is-deprecated-2dbbee8aec84)

Error on apt install

Err:7 https://packages.microsoft.com/debian/12/prod bookworm InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF
Reading package lists... Done
W: GPG error: https://packages.microsoft.com/debian/12/prod bookworm InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF
E: The repository 'https://packages.microsoft.com/debian/12/prod bookworm InRelease' is not signed.

solution is the installation of the key in the keyrings - only tested on debian 12 -
curl -sSL https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor | sudo tee /usr/share/keyrings/microsoft-prod.gpg > /dev/null