M121 release CUDA 12.2 images are now available. Updated TensorFlow 2.15 images from CUDA 12.1 to CUDA 12.2

## Feature **M121 release** * CUDA 12.2 images are now available. * Updated TensorFlow 2.15 images from CUDA 12.1 to CUDA 12.2. * Re-enabled `common-gpu` Deep Learning VM releases that were erroneously deactivated in M117. * Updated Nvidia drivers to 550.54.15 to fix an issue where Nvidia drivers failed to install on startup after Debian 11 images upgraded kernel to `linux-image-5.10.0-29-cloud-amd64`. * The `linux-headers-cloud-amd64` metapackage is now installed for faster driver recompiling on kernel upgrades. * TensorFlow 2.6 CPU and GPU images are deprecated. There will be no further updates to these images in future releases.